/usr/bin/java -Xmx8000000000 -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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:09:16,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:09:16,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:09:16,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:09:16,597 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 [2021-07-09 17:09:16,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:09:16,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:09:16,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:09:16,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:09:16,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:09:16,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:09:16,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:09:16,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:09:16,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:16,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:09:16,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:09:16,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:09:16,617 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:09:16,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:09:16,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:09:16,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:09:16,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:09:16,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:09:16,877 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:09:16,878 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:09:16,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-07-09 17:09:16,878 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-07-09 17:09:16,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:09:16,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:09:16,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:16,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:09:16,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:09:16,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:16,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:09:16,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:09:16,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:09:16,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/1) ... [2021-07-09 17:09:16,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:09:16,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:09:16,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:09:16,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:09:16,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (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 [2021-07-09 17:09:17,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:09:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:09:17,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:09:17,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:09:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:09:17,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:09:17,001 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:09:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:09:17,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:09:17,001 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:09:17,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:09:17,150 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:09:17,151 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:17 BoogieIcfgContainer [2021-07-09 17:09:17,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:09:17,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:09:17,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:09:17,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:09:17,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:16" (1/2) ... [2021-07-09 17:09:17,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372358dc and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:09:17, skipping insertion in model container [2021-07-09 17:09:17,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:17" (2/2) ... [2021-07-09 17:09:17,156 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-07-09 17:09:17,159 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:09:17,159 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:09:17,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:09:17,160 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:09:17,206 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:09:17,221 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:09:17,233 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:09:17,233 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:09:17,233 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:09:17,233 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:09:17,233 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:09:17,233 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:09:17,233 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:09:17,233 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:09:17,239 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-07-09 17:09:17,249 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:09:17,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,256 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,256 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash 203273584, now seen corresponding path program 1 times [2021-07-09 17:09:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619924437] [2021-07-09 17:09:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619924437] [2021-07-09 17:09:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619924437] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:17,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:17,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:09:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946687028] [2021-07-09 17:09:17,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:09:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:09:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:17,368 INFO L87 Difference]: Start difference. First operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,385 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-07-09 17:09:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:09:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:09:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,393 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:09:17,393 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 17:09:17,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 17:09:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-07-09 17:09:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-07-09 17:09:17,418 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-07-09 17:09:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,419 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-07-09 17:09:17,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-07-09 17:09:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:17,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,420 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:09:17,420 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 1 times [2021-07-09 17:09:17,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37152957] [2021-07-09 17:09:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37152957] [2021-07-09 17:09:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37152957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388317952] [2021-07-09 17:09:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:09:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388317952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:17,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 17:09:17,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968588392] [2021-07-09 17:09:17,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:17,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:17,578 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,636 INFO L93 Difference]: Finished difference Result 180 states and 361 transitions. [2021-07-09 17:09:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:09:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,638 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:09:17,638 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:09:17,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:09:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 101. [2021-07-09 17:09:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2021-07-09 17:09:17,647 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 15 [2021-07-09 17:09:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,647 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2021-07-09 17:09:17,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2021-07-09 17:09:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:17,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,648 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:09:17,864 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash 70799797, now seen corresponding path program 2 times [2021-07-09 17:09:17,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162707276] [2021-07-09 17:09:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162707276] [2021-07-09 17:09:17,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162707276] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:17,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:17,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:17,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938595852] [2021-07-09 17:09:17,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:17,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:17,888 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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) [2021-07-09 17:09:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,912 INFO L93 Difference]: Finished difference Result 120 states and 245 transitions. [2021-07-09 17:09:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:17,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 [2021-07-09 17:09:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,913 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:09:17,913 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:09:17,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:09:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-07-09 17:09:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-07-09 17:09:17,921 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-07-09 17:09:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,921 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-07-09 17:09:17,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) 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) [2021-07-09 17:09:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-07-09 17:09:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:09:17,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,922 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:09:17,923 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,923 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-07-09 17:09:17,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441894472] [2021-07-09 17:09:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441894472] [2021-07-09 17:09:18,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441894472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627627198] [2021-07-09 17:09:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:09:18,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627627198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:18,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 17:09:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515842622] [2021-07-09 17:09:18,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:18,223 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,398 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-07-09 17:09:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:09:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,400 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:09:18,400 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:09:18,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:09:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-07-09 17:09:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-07-09 17:09:18,406 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-07-09 17:09:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,407 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-07-09 17:09:18,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-07-09 17:09:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:09:18,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,408 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:18,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,625 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-07-09 17:09:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132602648] [2021-07-09 17:09:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:18,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132602648] [2021-07-09 17:09:18,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132602648] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:18,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:18,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:18,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812044228] [2021-07-09 17:09:18,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:18,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:18,651 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,666 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-07-09 17:09:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:09:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,667 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:09:18,667 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:09:18,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:09:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-07-09 17:09:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-07-09 17:09:18,672 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-07-09 17:09:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,673 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-07-09 17:09:18,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-07-09 17:09:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:18,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,674 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:18,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:09:18,674 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-07-09 17:09:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:18,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530784004] [2021-07-09 17:09:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530784004] [2021-07-09 17:09:18,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530784004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958812421] [2021-07-09 17:09:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:18,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958812421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809356997] [2021-07-09 17:09:18,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:18,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:18,829 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,919 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-07-09 17:09:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,921 INFO L225 Difference]: With dead ends: 323 [2021-07-09 17:09:18,921 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:09:18,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:09:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-07-09 17:09:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-07-09 17:09:18,930 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-07-09 17:09:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,930 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-07-09 17:09:18,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-07-09 17:09:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:18,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,931 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:19,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:19,161 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-07-09 17:09:19,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:19,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286111520] [2021-07-09 17:09:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:19,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286111520] [2021-07-09 17:09:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286111520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029020058] [2021-07-09 17:09:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:09:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:09:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:19,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029020058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:19,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-09 17:09:19,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127734959] [2021-07-09 17:09:19,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:19,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:19,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:19,535 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:19,897 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-07-09 17:09:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:19,900 INFO L225 Difference]: With dead ends: 526 [2021-07-09 17:09:19,900 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 17:09:19,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:09:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 17:09:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-07-09 17:09:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-07-09 17:09:19,914 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-07-09 17:09:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-07-09 17:09:19,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-07-09 17:09:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:19,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:19,916 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:20,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,139 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-07-09 17:09:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702234587] [2021-07-09 17:09:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:20,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702234587] [2021-07-09 17:09:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702234587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102331160] [2021-07-09 17:09:20,243 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 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 [2021-07-09 17:09:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:09:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102331160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:20,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-09 17:09:20,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643449831] [2021-07-09 17:09:20,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:20,397 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:20,666 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-07-09 17:09:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:09:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:20,669 INFO L225 Difference]: With dead ends: 636 [2021-07-09 17:09:20,669 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 17:09:20,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 17:09:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-07-09 17:09:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-07-09 17:09:20,680 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-07-09 17:09:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:20,680 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-07-09 17:09:20,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-07-09 17:09:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:20,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:20,681 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:20,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,899 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-07-09 17:09:20,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65728726] [2021-07-09 17:09:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:20,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65728726] [2021-07-09 17:09:20,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65728726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108524685] [2021-07-09 17:09:20,998 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 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 [2021-07-09 17:09:21,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:09:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108524685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:21,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-09 17:09:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857109913] [2021-07-09 17:09:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:21,151 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:21,384 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-07-09 17:09:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:21,389 INFO L225 Difference]: With dead ends: 772 [2021-07-09 17:09:21,389 INFO L226 Difference]: Without dead ends: 758 [2021-07-09 17:09:21,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:09:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-09 17:09:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-07-09 17:09:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-07-09 17:09:21,426 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-07-09 17:09:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:21,426 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-07-09 17:09:21,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-07-09 17:09:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:21,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:21,427 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:21,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:21,641 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-07-09 17:09:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991080733] [2021-07-09 17:09:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:21,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991080733] [2021-07-09 17:09:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991080733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035208326] [2021-07-09 17:09:21,785 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 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 [2021-07-09 17:09:21,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:09:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:21,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035208326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:21,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-09 17:09:21,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955781192] [2021-07-09 17:09:21,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:21,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:21,925 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,178 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-07-09 17:09:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:09:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,182 INFO L225 Difference]: With dead ends: 760 [2021-07-09 17:09:22,182 INFO L226 Difference]: Without dead ends: 753 [2021-07-09 17:09:22,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-07-09 17:09:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-07-09 17:09:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-07-09 17:09:22,196 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-07-09 17:09:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,197 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-07-09 17:09:22,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-07-09 17:09:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:09:22,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,199 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:22,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:09:22,413 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-07-09 17:09:22,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:22,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562839938] [2021-07-09 17:09:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:22,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:22,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562839938] [2021-07-09 17:09:22,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562839938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705793579] [2021-07-09 17:09:22,518 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 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 [2021-07-09 17:09:22,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:22,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:09:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:22,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705793579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:22,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-09 17:09:22,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687075620] [2021-07-09 17:09:22,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:22,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:22,674 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,911 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-07-09 17:09:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:09:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:09:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,915 INFO L225 Difference]: With dead ends: 812 [2021-07-09 17:09:22,915 INFO L226 Difference]: Without dead ends: 805 [2021-07-09 17:09:22,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-07-09 17:09:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-07-09 17:09:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-07-09 17:09:22,929 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-07-09 17:09:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,930 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-07-09 17:09:22,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-07-09 17:09:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:22,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:23,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:09:23,141 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-07-09 17:09:23,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:23,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107167407] [2021-07-09 17:09:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:23,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107167407] [2021-07-09 17:09:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107167407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752056852] [2021-07-09 17:09:23,280 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 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 [2021-07-09 17:09:23,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:23,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752056852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:23,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:23,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606715783] [2021-07-09 17:09:23,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:23,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:23,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:23,443 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,048 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-07-09 17:09:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:09:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,054 INFO L225 Difference]: With dead ends: 1425 [2021-07-09 17:09:24,054 INFO L226 Difference]: Without dead ends: 1411 [2021-07-09 17:09:24,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:09:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-07-09 17:09:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-07-09 17:09:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-07-09 17:09:24,078 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-07-09 17:09:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:24,078 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-07-09 17:09:24,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-07-09 17:09:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:24,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:24,080 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:24,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,289 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-07-09 17:09:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260747858] [2021-07-09 17:09:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:24,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260747858] [2021-07-09 17:09:24,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260747858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776290469] [2021-07-09 17:09:24,316 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 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 [2021-07-09 17:09:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:24,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776290469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:24,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372924407] [2021-07-09 17:09:24,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:24,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:24,386 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,442 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-07-09 17:09:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:09:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,447 INFO L225 Difference]: With dead ends: 1306 [2021-07-09 17:09:24,447 INFO L226 Difference]: Without dead ends: 1303 [2021-07-09 17:09:24,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-07-09 17:09:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-07-09 17:09:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-07-09 17:09:24,468 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-07-09 17:09:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:24,468 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-07-09 17:09:24,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-07-09 17:09:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:24,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:24,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:24,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,687 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-07-09 17:09:24,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880885870] [2021-07-09 17:09:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:24,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880885870] [2021-07-09 17:09:24,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880885870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539982009] [2021-07-09 17:09:24,731 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 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 [2021-07-09 17:09:24,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:24,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539982009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700818501] [2021-07-09 17:09:24,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:24,789 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,836 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-07-09 17:09:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:09:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,842 INFO L225 Difference]: With dead ends: 1948 [2021-07-09 17:09:24,842 INFO L226 Difference]: Without dead ends: 1948 [2021-07-09 17:09:24,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-07-09 17:09:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-07-09 17:09:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-07-09 17:09:24,887 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-07-09 17:09:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:24,887 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-07-09 17:09:24,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-07-09 17:09:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:24,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:24,890 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:25,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:09:25,090 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-07-09 17:09:25,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221327000] [2021-07-09 17:09:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:25,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221327000] [2021-07-09 17:09:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221327000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025562387] [2021-07-09 17:09:25,124 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 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 [2021-07-09 17:09:25,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:09:25,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025562387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:25,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061717056] [2021-07-09 17:09:25,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:25,210 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:25,257 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-07-09 17:09:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:09:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:25,265 INFO L225 Difference]: With dead ends: 1941 [2021-07-09 17:09:25,265 INFO L226 Difference]: Without dead ends: 1938 [2021-07-09 17:09:25,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-07-09 17:09:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-07-09 17:09:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-07-09 17:09:25,300 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-07-09 17:09:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,300 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-07-09 17:09:25,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-07-09 17:09:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:25,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:25,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:09:25,513 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-07-09 17:09:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69829123] [2021-07-09 17:09:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:25,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69829123] [2021-07-09 17:09:25,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69829123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783737030] [2021-07-09 17:09:25,535 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 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 [2021-07-09 17:09:25,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:25,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:25,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783737030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:25,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:25,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733035459] [2021-07-09 17:09:25,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:25,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:25,607 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:25,660 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-07-09 17:09:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:09:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:25,667 INFO L225 Difference]: With dead ends: 1932 [2021-07-09 17:09:25,667 INFO L226 Difference]: Without dead ends: 1918 [2021-07-09 17:09:25,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-07-09 17:09:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-07-09 17:09:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-07-09 17:09:25,696 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-07-09 17:09:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,696 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-07-09 17:09:25,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-07-09 17:09:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:25,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,699 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:25,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:09:25,913 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-07-09 17:09:25,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575953352] [2021-07-09 17:09:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:26,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575953352] [2021-07-09 17:09:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575953352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583293206] [2021-07-09 17:09:26,037 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 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 [2021-07-09 17:09:26,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:26,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:26,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:26,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583293206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:26,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986735110] [2021-07-09 17:09:26,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:26,215 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:26,852 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-07-09 17:09:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:09:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:26,860 INFO L225 Difference]: With dead ends: 2667 [2021-07-09 17:09:26,860 INFO L226 Difference]: Without dead ends: 2634 [2021-07-09 17:09:26,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:09:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-07-09 17:09:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-07-09 17:09:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-07-09 17:09:26,897 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-07-09 17:09:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:26,898 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-07-09 17:09:26,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-07-09 17:09:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:26,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:26,901 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:27,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,116 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-07-09 17:09:27,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:27,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321512359] [2021-07-09 17:09:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:27,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321512359] [2021-07-09 17:09:27,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321512359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947337359] [2021-07-09 17:09:27,259 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:09:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947337359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:27,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:27,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239504937] [2021-07-09 17:09:27,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:27,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:27,426 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:27,938 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-07-09 17:09:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:09:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:27,947 INFO L225 Difference]: With dead ends: 2799 [2021-07-09 17:09:27,947 INFO L226 Difference]: Without dead ends: 2766 [2021-07-09 17:09:27,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:09:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-07-09 17:09:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-07-09 17:09:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-07-09 17:09:28,005 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-07-09 17:09:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:28,007 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-07-09 17:09:28,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-07-09 17:09:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:28,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:28,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:28,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:09:28,226 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:28,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-07-09 17:09:28,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:28,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444290916] [2021-07-09 17:09:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:28,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:28,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444290916] [2021-07-09 17:09:28,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444290916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746848868] [2021-07-09 17:09:28,352 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 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 [2021-07-09 17:09:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:28,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746848868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:28,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51999555] [2021-07-09 17:09:28,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:28,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:28,545 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:29,111 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-07-09 17:09:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:09:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:29,118 INFO L225 Difference]: With dead ends: 3085 [2021-07-09 17:09:29,118 INFO L226 Difference]: Without dead ends: 3052 [2021-07-09 17:09:29,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:09:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-07-09 17:09:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-07-09 17:09:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-07-09 17:09:29,173 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-07-09 17:09:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:29,173 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-07-09 17:09:29,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-07-09 17:09:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:29,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:29,177 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:29,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,394 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-07-09 17:09:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:29,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498436091] [2021-07-09 17:09:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:29,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:29,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498436091] [2021-07-09 17:09:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498436091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977435544] [2021-07-09 17:09:29,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:29,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:29,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977435544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:29,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:29,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694726524] [2021-07-09 17:09:29,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:29,668 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:30,189 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-07-09 17:09:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:09:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:09:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:30,196 INFO L225 Difference]: With dead ends: 3403 [2021-07-09 17:09:30,196 INFO L226 Difference]: Without dead ends: 3367 [2021-07-09 17:09:30,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:09:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-07-09 17:09:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-07-09 17:09:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-07-09 17:09:30,255 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-07-09 17:09:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:30,255 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-07-09 17:09:30,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-07-09 17:09:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:30,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:30,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:30,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:30,465 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-07-09 17:09:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:30,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081825121] [2021-07-09 17:09:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:30,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081825121] [2021-07-09 17:09:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081825121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417050911] [2021-07-09 17:09:30,590 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 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 [2021-07-09 17:09:30,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:30,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:30,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417050911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:30,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:30,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:30,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575258000] [2021-07-09 17:09:30,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:30,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:30,758 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:31,271 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-07-09 17:09:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:09:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:31,279 INFO L225 Difference]: With dead ends: 3443 [2021-07-09 17:09:31,279 INFO L226 Difference]: Without dead ends: 3410 [2021-07-09 17:09:31,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:09:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-07-09 17:09:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-07-09 17:09:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-07-09 17:09:31,353 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-07-09 17:09:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:31,353 INFO L482 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-07-09 17:09:31,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-07-09 17:09:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:31,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:31,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:09:31,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-07-09 17:09:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805420721] [2021-07-09 17:09:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:31,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805420721] [2021-07-09 17:09:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805420721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465813343] [2021-07-09 17:09:31,693 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 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 [2021-07-09 17:09:31,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465813343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:31,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116547522] [2021-07-09 17:09:31,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:31,858 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:32,286 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-07-09 17:09:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:09:32,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:32,293 INFO L225 Difference]: With dead ends: 3520 [2021-07-09 17:09:32,293 INFO L226 Difference]: Without dead ends: 3507 [2021-07-09 17:09:32,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-07-09 17:09:32,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-07-09 17:09:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-07-09 17:09:32,379 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-07-09 17:09:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:32,380 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-07-09 17:09:32,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-07-09 17:09:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:09:32,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:32,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:32,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:32,604 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-07-09 17:09:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:32,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355666104] [2021-07-09 17:09:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:32,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:32,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355666104] [2021-07-09 17:09:32,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355666104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690874863] [2021-07-09 17:09:32,743 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 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 [2021-07-09 17:09:32,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:32,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690874863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:32,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:32,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080053510] [2021-07-09 17:09:32,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:32,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:32,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:32,919 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:33,481 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-07-09 17:09:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:09:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 25 [2021-07-09 17:09:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:33,489 INFO L225 Difference]: With dead ends: 3850 [2021-07-09 17:09:33,489 INFO L226 Difference]: Without dead ends: 3817 [2021-07-09 17:09:33,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-07-09 17:09:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-07-09 17:09:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-07-09 17:09:33,541 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-07-09 17:09:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:33,541 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-07-09 17:09:33,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-07-09 17:09:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-07-09 17:09:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:33,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:33,546 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:33,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:09:33,765 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-07-09 17:09:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:33,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556921711] [2021-07-09 17:09:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:33,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556921711] [2021-07-09 17:09:33,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556921711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258811741] [2021-07-09 17:09:33,862 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:33,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:33,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258811741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:33,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 17:09:33,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319145648] [2021-07-09 17:09:33,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:33,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:33,984 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-09 17:09:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:34,155 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-07-09 17:09:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:34,172 INFO L225 Difference]: With dead ends: 3385 [2021-07-09 17:09:34,172 INFO L226 Difference]: Without dead ends: 3093 [2021-07-09 17:09:34,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-07-09 17:09:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-07-09 17:09:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-07-09 17:09:34,209 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-07-09 17:09:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:34,209 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-07-09 17:09:34,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-09 17:09:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-07-09 17:09:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:09:34,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:34,213 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:34,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:09:34,429 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-07-09 17:09:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:34,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920267191] [2021-07-09 17:09:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:34,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:34,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920267191] [2021-07-09 17:09:34,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920267191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594109247] [2021-07-09 17:09:34,577 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:34,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:34,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:09:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:34,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594109247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:34,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:09:34,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503239980] [2021-07-09 17:09:34,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:09:34,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:09:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:09:34,810 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-07-09 17:09:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:35,513 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-07-09 17:09:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:09:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-07-09 17:09:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:35,518 INFO L225 Difference]: With dead ends: 3805 [2021-07-09 17:09:35,518 INFO L226 Difference]: Without dead ends: 3772 [2021-07-09 17:09:35,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:09:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-07-09 17:09:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-07-09 17:09:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-07-09 17:09:35,562 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-07-09 17:09:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:35,562 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-07-09 17:09:35,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-07-09 17:09:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-07-09 17:09:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:09:35,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:35,566 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:35,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:35,782 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-07-09 17:09:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:35,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567132080] [2021-07-09 17:09:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:35,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567132080] [2021-07-09 17:09:35,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567132080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840937898] [2021-07-09 17:09:35,932 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 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 [2021-07-09 17:09:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:09:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:36,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840937898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:36,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:36,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:09:36,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42570775] [2021-07-09 17:09:36,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:09:36,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:09:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:09:36,153 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-07-09 17:09:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:36,873 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-07-09 17:09:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:09:36,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-07-09 17:09:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:36,878 INFO L225 Difference]: With dead ends: 3901 [2021-07-09 17:09:36,878 INFO L226 Difference]: Without dead ends: 3868 [2021-07-09 17:09:36,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:09:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-07-09 17:09:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-07-09 17:09:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-07-09 17:09:36,924 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-07-09 17:09:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:36,924 INFO L482 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-07-09 17:09:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-07-09 17:09:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-07-09 17:09:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:09:36,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:36,928 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:37,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:09:37,145 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-07-09 17:09:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:37,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083844016] [2021-07-09 17:09:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:37,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083844016] [2021-07-09 17:09:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083844016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859862532] [2021-07-09 17:09:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:37,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:09:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:37,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859862532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:37,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:09:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792204651] [2021-07-09 17:09:37,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:09:37,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:09:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:37,540 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:38,379 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-07-09 17:09:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:09:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 17:09:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:38,384 INFO L225 Difference]: With dead ends: 4372 [2021-07-09 17:09:38,384 INFO L226 Difference]: Without dead ends: 4339 [2021-07-09 17:09:38,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:09:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-07-09 17:09:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-07-09 17:09:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-07-09 17:09:38,434 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-07-09 17:09:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:38,434 INFO L482 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-07-09 17:09:38,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-07-09 17:09:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:38,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,439 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:38,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:38,656 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:38,656 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-07-09 17:09:38,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:38,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840354274] [2021-07-09 17:09:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:38,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840354274] [2021-07-09 17:09:38,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840354274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129593577] [2021-07-09 17:09:38,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:38,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129593577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:38,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:09:38,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289787623] [2021-07-09 17:09:38,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:38,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:38,750 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:38,844 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-07-09 17:09:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:38,850 INFO L225 Difference]: With dead ends: 4649 [2021-07-09 17:09:38,850 INFO L226 Difference]: Without dead ends: 4649 [2021-07-09 17:09:38,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-07-09 17:09:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-07-09 17:09:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-07-09 17:09:38,916 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-07-09 17:09:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-07-09 17:09:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-07-09 17:09:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:38,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,922 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:09:39,137 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-07-09 17:09:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608316763] [2021-07-09 17:09:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:39,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608316763] [2021-07-09 17:09:39,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608316763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150693271] [2021-07-09 17:09:39,169 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 [2021-07-09 17:09:39,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:39,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150693271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-07-09 17:09:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964750221] [2021-07-09 17:09:39,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:39,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:39,244 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2021-07-09 17:09:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,325 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-07-09 17:09:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 29 [2021-07-09 17:09:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,329 INFO L225 Difference]: With dead ends: 3822 [2021-07-09 17:09:39,329 INFO L226 Difference]: Without dead ends: 3822 [2021-07-09 17:09:39,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-07-09 17:09:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-07-09 17:09:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-07-09 17:09:39,369 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-07-09 17:09:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-07-09 17:09:39,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2021-07-09 17:09:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-07-09 17:09:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:39,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:09:39,588 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-07-09 17:09:39,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065351290] [2021-07-09 17:09:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:39,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:39,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065351290] [2021-07-09 17:09:39,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065351290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258105379] [2021-07-09 17:09:39,606 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 [2021-07-09 17:09:39,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:39,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:39,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258105379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:39,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817785665] [2021-07-09 17:09:39,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:39,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:39,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:39,663 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,721 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-07-09 17:09:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,726 INFO L225 Difference]: With dead ends: 3755 [2021-07-09 17:09:39,726 INFO L226 Difference]: Without dead ends: 3743 [2021-07-09 17:09:39,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-07-09 17:09:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-07-09 17:09:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-07-09 17:09:39,769 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-07-09 17:09:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,769 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-07-09 17:09:39,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-07-09 17:09:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:39,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:39,979 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-07-09 17:09:39,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323860948] [2021-07-09 17:09:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:40,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323860948] [2021-07-09 17:09:40,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323860948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321392219] [2021-07-09 17:09:40,004 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 [2021-07-09 17:09:40,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:40,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321392219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:40,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42129441] [2021-07-09 17:09:40,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:40,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:40,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:40,057 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,101 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-07-09 17:09:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,106 INFO L225 Difference]: With dead ends: 3731 [2021-07-09 17:09:40,106 INFO L226 Difference]: Without dead ends: 3731 [2021-07-09 17:09:40,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-07-09 17:09:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-07-09 17:09:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-07-09 17:09:40,143 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-07-09 17:09:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,143 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-07-09 17:09:40,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-07-09 17:09:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:40,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,147 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,356 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-07-09 17:09:40,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933491838] [2021-07-09 17:09:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:40,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933491838] [2021-07-09 17:09:40,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933491838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032888049] [2021-07-09 17:09:40,395 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) [2021-07-09 17:09:40,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032888049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410050759] [2021-07-09 17:09:40,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:40,462 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-07-09 17:09:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,519 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-07-09 17:09:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-07-09 17:09:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,524 INFO L225 Difference]: With dead ends: 3810 [2021-07-09 17:09:40,524 INFO L226 Difference]: Without dead ends: 3808 [2021-07-09 17:09:40,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-07-09 17:09:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-07-09 17:09:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-07-09 17:09:40,573 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-07-09 17:09:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,573 INFO L482 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-07-09 17:09:40,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-07-09 17:09:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-07-09 17:09:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:40,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,577 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:09:40,777 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-07-09 17:09:40,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161864287] [2021-07-09 17:09:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:40,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161864287] [2021-07-09 17:09:40,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161864287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509978482] [2021-07-09 17:09:40,799 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 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 [2021-07-09 17:09:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:40,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509978482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 17:09:40,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009918753] [2021-07-09 17:09:40,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:40,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:40,869 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-07-09 17:09:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,918 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-07-09 17:09:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-07-09 17:09:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,922 INFO L225 Difference]: With dead ends: 3976 [2021-07-09 17:09:40,922 INFO L226 Difference]: Without dead ends: 3973 [2021-07-09 17:09:40,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-07-09 17:09:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-07-09 17:09:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-07-09 17:09:40,973 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-07-09 17:09:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,973 INFO L482 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-07-09 17:09:40,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-07-09 17:09:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-07-09 17:09:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:40,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,977 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:41,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:41,192 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-07-09 17:09:41,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:41,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353462461] [2021-07-09 17:09:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:41,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353462461] [2021-07-09 17:09:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353462461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92447169] [2021-07-09 17:09:41,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:41,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:41,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92447169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:41,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:41,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689168108] [2021-07-09 17:09:41,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:41,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:41,289 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:09:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:41,360 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-07-09 17:09:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 29 [2021-07-09 17:09:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:41,365 INFO L225 Difference]: With dead ends: 3970 [2021-07-09 17:09:41,365 INFO L226 Difference]: Without dead ends: 3967 [2021-07-09 17:09:41,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-07-09 17:09:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-07-09 17:09:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-07-09 17:09:41,408 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-07-09 17:09:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:41,408 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-07-09 17:09:41,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:09:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-07-09 17:09:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:09:41,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:41,412 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:41,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:09:41,625 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-07-09 17:09:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:41,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275285796] [2021-07-09 17:09:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:41,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275285796] [2021-07-09 17:09:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275285796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963946645] [2021-07-09 17:09:41,785 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 [2021-07-09 17:09:41,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:09:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:09:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963946645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:42,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:09:42,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488125068] [2021-07-09 17:09:42,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:09:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:09:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:42,043 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:43,144 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-07-09 17:09:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:09:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:09:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:43,150 INFO L225 Difference]: With dead ends: 4929 [2021-07-09 17:09:43,150 INFO L226 Difference]: Without dead ends: 4855 [2021-07-09 17:09:43,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:09:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-07-09 17:09:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-07-09 17:09:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-07-09 17:09:43,197 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-07-09 17:09:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:43,197 INFO L482 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-07-09 17:09:43,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-07-09 17:09:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:09:43,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:43,201 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:43,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:09:43,417 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-07-09 17:09:43,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:43,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509777556] [2021-07-09 17:09:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:43,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509777556] [2021-07-09 17:09:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509777556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943120265] [2021-07-09 17:09:43,556 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 [2021-07-09 17:09:43,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:43,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:09:43,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:43,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943120265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:43,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:09:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980737037] [2021-07-09 17:09:43,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:09:43,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:09:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:43,788 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:44,748 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-07-09 17:09:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:09:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:09:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:44,755 INFO L225 Difference]: With dead ends: 5234 [2021-07-09 17:09:44,755 INFO L226 Difference]: Without dead ends: 5194 [2021-07-09 17:09:44,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:09:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-07-09 17:09:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-07-09 17:09:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-07-09 17:09:44,815 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-07-09 17:09:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:44,815 INFO L482 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-07-09 17:09:44,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-07-09 17:09:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:09:44,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:44,819 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:45,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:09:45,020 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-07-09 17:09:45,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660536101] [2021-07-09 17:09:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:45,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660536101] [2021-07-09 17:09:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660536101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882148983] [2021-07-09 17:09:45,121 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 [2021-07-09 17:09:45,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:09:45,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:45,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:09:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:45,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882148983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:45,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:09:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511009271] [2021-07-09 17:09:45,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:09:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:09:45,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:45,379 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-09 17:09:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:46,377 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-07-09 17:09:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:09:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 31 [2021-07-09 17:09:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:46,384 INFO L225 Difference]: With dead ends: 5435 [2021-07-09 17:09:46,384 INFO L226 Difference]: Without dead ends: 5402 [2021-07-09 17:09:46,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:09:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-07-09 17:09:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-07-09 17:09:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-07-09 17:09:46,436 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-07-09 17:09:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:46,436 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-07-09 17:09:46,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-09 17:09:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-07-09 17:09:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:09:46,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:46,440 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:46,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:09:46,648 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-07-09 17:09:46,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:46,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938986525] [2021-07-09 17:09:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:46,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:46,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938986525] [2021-07-09 17:09:46,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938986525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624044744] [2021-07-09 17:09:46,776 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 [2021-07-09 17:09:46,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:09:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:09:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624044744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:47,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:09:47,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939095099] [2021-07-09 17:09:47,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:09:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:09:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:47,033 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:47,893 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-07-09 17:09:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:09:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:09:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:47,901 INFO L225 Difference]: With dead ends: 5530 [2021-07-09 17:09:47,901 INFO L226 Difference]: Without dead ends: 5486 [2021-07-09 17:09:47,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:09:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-07-09 17:09:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-07-09 17:09:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-07-09 17:09:47,965 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-07-09 17:09:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:47,965 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-07-09 17:09:47,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-07-09 17:09:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:47,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:47,970 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:48,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:09:48,186 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-07-09 17:09:48,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:48,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183658475] [2021-07-09 17:09:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183658475] [2021-07-09 17:09:48,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183658475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518175408] [2021-07-09 17:09:48,292 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 [2021-07-09 17:09:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:48,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518175408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:09:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888023378] [2021-07-09 17:09:48,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:09:48,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:09:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:48,475 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:48,791 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-07-09 17:09:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:09:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 32 [2021-07-09 17:09:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:48,798 INFO L225 Difference]: With dead ends: 5662 [2021-07-09 17:09:48,798 INFO L226 Difference]: Without dead ends: 5648 [2021-07-09 17:09:48,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-07-09 17:09:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-07-09 17:09:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-07-09 17:09:48,859 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-07-09 17:09:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:48,859 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-07-09 17:09:48,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-07-09 17:09:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:48,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:48,864 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:09:49,064 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-07-09 17:09:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321475569] [2021-07-09 17:09:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:49,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321475569] [2021-07-09 17:09:49,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321475569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:49,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630629271] [2021-07-09 17:09:49,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:49,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:49,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630629271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:49,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:49,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:09:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878278274] [2021-07-09 17:09:49,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:09:49,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:09:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:49,402 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:49,796 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-07-09 17:09:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:09:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 32 [2021-07-09 17:09:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:49,804 INFO L225 Difference]: With dead ends: 5807 [2021-07-09 17:09:49,804 INFO L226 Difference]: Without dead ends: 5793 [2021-07-09 17:09:49,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:09:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-07-09 17:09:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-07-09 17:09:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-07-09 17:09:49,874 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-07-09 17:09:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:49,874 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-07-09 17:09:49,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-07-09 17:09:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:49,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:49,879 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:50,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:09:50,091 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-07-09 17:09:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:50,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531691509] [2021-07-09 17:09:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531691509] [2021-07-09 17:09:50,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531691509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355449046] [2021-07-09 17:09:50,189 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 [2021-07-09 17:09:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:50,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355449046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:50,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:50,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052087740] [2021-07-09 17:09:50,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:50,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:50,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:50,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:50,388 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:50,922 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-07-09 17:09:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:09:50,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:50,932 INFO L225 Difference]: With dead ends: 6674 [2021-07-09 17:09:50,932 INFO L226 Difference]: Without dead ends: 6644 [2021-07-09 17:09:50,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:09:50,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-07-09 17:09:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-07-09 17:09:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-07-09 17:09:51,009 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-07-09 17:09:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:51,009 INFO L482 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-07-09 17:09:51,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-07-09 17:09:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:51,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:51,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:51,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:51,214 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-07-09 17:09:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:51,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134761150] [2021-07-09 17:09:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:51,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:51,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134761150] [2021-07-09 17:09:51,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134761150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862174633] [2021-07-09 17:09:51,315 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 [2021-07-09 17:09:51,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:51,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862174633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:51,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157386719] [2021-07-09 17:09:51,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:51,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:51,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:51,508 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:51,840 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-07-09 17:09:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:51,851 INFO L225 Difference]: With dead ends: 7466 [2021-07-09 17:09:51,851 INFO L226 Difference]: Without dead ends: 7426 [2021-07-09 17:09:51,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:09:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-07-09 17:09:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-07-09 17:09:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-07-09 17:09:51,954 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-07-09 17:09:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:51,954 INFO L482 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-07-09 17:09:51,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-07-09 17:09:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:51,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:51,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:52,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:52,160 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-07-09 17:09:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485139043] [2021-07-09 17:09:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:52,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485139043] [2021-07-09 17:09:52,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485139043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9204783] [2021-07-09 17:09:52,265 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 [2021-07-09 17:09:52,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:52,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:52,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9204783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:52,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:09:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522216140] [2021-07-09 17:09:52,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:52,454 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) [2021-07-09 17:09:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:52,871 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-07-09 17:09:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:09:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:52,880 INFO L225 Difference]: With dead ends: 7186 [2021-07-09 17:09:52,880 INFO L226 Difference]: Without dead ends: 7172 [2021-07-09 17:09:52,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-07-09 17:09:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-07-09 17:09:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-07-09 17:09:52,991 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-07-09 17:09:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:52,991 INFO L482 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-07-09 17:09:52,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) [2021-07-09 17:09:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-07-09 17:09:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:52,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:52,997 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:53,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:53,197 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-07-09 17:09:53,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:53,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339555599] [2021-07-09 17:09:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339555599] [2021-07-09 17:09:53,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339555599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296867151] [2021-07-09 17:09:53,297 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 [2021-07-09 17:09:53,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:53,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:53,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296867151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:53,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:53,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652422308] [2021-07-09 17:09:53,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:53,498 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:53,847 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-07-09 17:09:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:09:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:53,858 INFO L225 Difference]: With dead ends: 8381 [2021-07-09 17:09:53,858 INFO L226 Difference]: Without dead ends: 8341 [2021-07-09 17:09:53,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:09:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-07-09 17:09:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-07-09 17:09:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-07-09 17:09:53,951 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-07-09 17:09:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:53,951 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-07-09 17:09:53,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-07-09 17:09:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:53,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:53,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:54,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 17:09:54,158 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:54,158 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-07-09 17:09:54,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089014980] [2021-07-09 17:09:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:54,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089014980] [2021-07-09 17:09:54,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089014980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710818638] [2021-07-09 17:09:54,250 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 [2021-07-09 17:09:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:54,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:54,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710818638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:54,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:09:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353549205] [2021-07-09 17:09:54,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:09:54,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:09:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:54,413 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:54,899 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-07-09 17:09:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:09:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 32 [2021-07-09 17:09:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:54,911 INFO L225 Difference]: With dead ends: 9510 [2021-07-09 17:09:54,911 INFO L226 Difference]: Without dead ends: 9476 [2021-07-09 17:09:54,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-07-09 17:09:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-07-09 17:09:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-07-09 17:09:55,021 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-07-09 17:09:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:55,021 INFO L482 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-07-09 17:09:55,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-07-09 17:09:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-07-09 17:09:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:55,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:55,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:55,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:55,229 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-07-09 17:09:55,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:55,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173161594] [2021-07-09 17:09:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:55,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173161594] [2021-07-09 17:09:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173161594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527359813] [2021-07-09 17:09:55,321 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 [2021-07-09 17:09:55,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:55,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527359813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:55,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:55,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815036169] [2021-07-09 17:09:55,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:55,502 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2021-07-09 17:09:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:55,897 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-07-09 17:09:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:09:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:55,910 INFO L225 Difference]: With dead ends: 9488 [2021-07-09 17:09:55,910 INFO L226 Difference]: Without dead ends: 9449 [2021-07-09 17:09:55,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-07-09 17:09:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-07-09 17:09:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-07-09 17:09:56,031 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-07-09 17:09:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:56,031 INFO L482 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-07-09 17:09:56,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2021-07-09 17:09:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-07-09 17:09:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:56,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:56,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:56,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:56,246 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-07-09 17:09:56,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:56,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898811095] [2021-07-09 17:09:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:56,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898811095] [2021-07-09 17:09:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898811095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877455601] [2021-07-09 17:09:56,332 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 [2021-07-09 17:09:56,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:56,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877455601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:56,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:56,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800708456] [2021-07-09 17:09:56,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:56,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:56,508 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:56,963 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-07-09 17:09:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:09:56,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:56,978 INFO L225 Difference]: With dead ends: 11530 [2021-07-09 17:09:56,978 INFO L226 Difference]: Without dead ends: 11490 [2021-07-09 17:09:56,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-07-09 17:09:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-07-09 17:09:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-07-09 17:09:57,100 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-07-09 17:09:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:57,100 INFO L482 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-07-09 17:09:57,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-07-09 17:09:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:57,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:57,159 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:57,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:09:57,359 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-07-09 17:09:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:57,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189035895] [2021-07-09 17:09:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:57,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:57,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189035895] [2021-07-09 17:09:57,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189035895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016416690] [2021-07-09 17:09:57,443 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 [2021-07-09 17:09:57,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:57,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:57,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016416690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:57,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:09:57,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147433799] [2021-07-09 17:09:57,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:09:57,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:57,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:09:57,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:57,616 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:57,919 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-07-09 17:09:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:09:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:57,933 INFO L225 Difference]: With dead ends: 10586 [2021-07-09 17:09:57,933 INFO L226 Difference]: Without dead ends: 10559 [2021-07-09 17:09:57,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-07-09 17:09:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-07-09 17:09:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-07-09 17:09:58,055 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-07-09 17:09:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:58,055 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-07-09 17:09:58,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-07-09 17:09:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:58,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:58,063 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:58,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:09:58,264 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-07-09 17:09:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:58,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373947382] [2021-07-09 17:09:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373947382] [2021-07-09 17:09:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373947382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088479450] [2021-07-09 17:09:58,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:58,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:58,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088479450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:58,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:09:58,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501354146] [2021-07-09 17:09:58,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:09:58,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:58,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:09:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:58,522 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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) [2021-07-09 17:09:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:58,851 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-07-09 17:09:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:09:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 32 [2021-07-09 17:09:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:58,866 INFO L225 Difference]: With dead ends: 11077 [2021-07-09 17:09:58,866 INFO L226 Difference]: Without dead ends: 11043 [2021-07-09 17:09:58,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-07-09 17:09:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-07-09 17:09:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-07-09 17:09:58,994 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-07-09 17:09:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:58,994 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-07-09 17:09:58,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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) [2021-07-09 17:09:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-07-09 17:09:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:59,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:59,003 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:59,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:09:59,203 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-07-09 17:09:59,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:59,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754396514] [2021-07-09 17:09:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:59,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:59,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754396514] [2021-07-09 17:09:59,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754396514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814893994] [2021-07-09 17:09:59,305 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 [2021-07-09 17:09:59,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:59,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:59,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814893994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:59,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:09:59,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341033677] [2021-07-09 17:09:59,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:09:59,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:09:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:59,493 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:59,860 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-07-09 17:09:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:59,875 INFO L225 Difference]: With dead ends: 11359 [2021-07-09 17:09:59,875 INFO L226 Difference]: Without dead ends: 11319 [2021-07-09 17:09:59,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:09:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-07-09 17:10:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-07-09 17:10:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-07-09 17:10:00,063 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-07-09 17:10:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:00,063 INFO L482 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-07-09 17:10:00,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-07-09 17:10:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:10:00,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:00,072 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:00,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:00,273 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-07-09 17:10:00,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:00,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829079726] [2021-07-09 17:10:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 17:10:00,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:00,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829079726] [2021-07-09 17:10:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829079726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247868673] [2021-07-09 17:10:00,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:00,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:10:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 17:10:00,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247868673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:00,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:10:00,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730932358] [2021-07-09 17:10:00,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:00,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:00,504 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2021-07-09 17:10:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:00,786 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-07-09 17:10:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 33 [2021-07-09 17:10:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:00,808 INFO L225 Difference]: With dead ends: 10579 [2021-07-09 17:10:00,808 INFO L226 Difference]: Without dead ends: 10480 [2021-07-09 17:10:00,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:10:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-07-09 17:10:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-07-09 17:10:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-07-09 17:10:00,957 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-07-09 17:10:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:00,957 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-07-09 17:10:00,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2021-07-09 17:10:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-07-09 17:10:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:00,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:00,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:01,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:01,169 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-07-09 17:10:01,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:01,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348747030] [2021-07-09 17:10:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:01,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:01,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348747030] [2021-07-09 17:10:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348747030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425575017] [2021-07-09 17:10:01,205 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 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 [2021-07-09 17:10:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:10:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:01,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425575017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:01,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:10:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105526881] [2021-07-09 17:10:01,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:01,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:01,314 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:01,476 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-07-09 17:10:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:01,497 INFO L225 Difference]: With dead ends: 13175 [2021-07-09 17:10:01,498 INFO L226 Difference]: Without dead ends: 13175 [2021-07-09 17:10:01,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-07-09 17:10:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-07-09 17:10:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-07-09 17:10:01,663 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-07-09 17:10:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-07-09 17:10:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-07-09 17:10:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:01,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:01,673 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:01,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:01,874 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-07-09 17:10:01,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:01,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975310564] [2021-07-09 17:10:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:01,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:01,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975310564] [2021-07-09 17:10:01,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975310564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009399967] [2021-07-09 17:10:01,914 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:01,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:01,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:01,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:10:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009399967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:02,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:10:02,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373911862] [2021-07-09 17:10:02,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:02,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:02,021 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:02,173 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-07-09 17:10:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:02,194 INFO L225 Difference]: With dead ends: 9582 [2021-07-09 17:10:02,194 INFO L226 Difference]: Without dead ends: 9546 [2021-07-09 17:10:02,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-07-09 17:10:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-07-09 17:10:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-07-09 17:10:02,312 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-07-09 17:10:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:02,312 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-07-09 17:10:02,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-07-09 17:10:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:02,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:02,320 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:02,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:02,520 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-07-09 17:10:02,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:02,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112355650] [2021-07-09 17:10:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:02,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112355650] [2021-07-09 17:10:02,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112355650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284976276] [2021-07-09 17:10:02,542 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 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 [2021-07-09 17:10:02,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:02,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284976276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:02,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:10:02,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101666062] [2021-07-09 17:10:02,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:02,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:02,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:02,611 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:02,686 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-07-09 17:10:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:02,698 INFO L225 Difference]: With dead ends: 9119 [2021-07-09 17:10:02,699 INFO L226 Difference]: Without dead ends: 9116 [2021-07-09 17:10:02,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-07-09 17:10:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-07-09 17:10:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-07-09 17:10:02,800 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-07-09 17:10:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:02,800 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-07-09 17:10:02,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-07-09 17:10:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:02,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:02,809 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 17:10:03,010 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-07-09 17:10:03,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532556511] [2021-07-09 17:10:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:03,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532556511] [2021-07-09 17:10:03,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532556511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212545975] [2021-07-09 17:10:03,030 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 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 [2021-07-09 17:10:03,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:03,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:10:03,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212545975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:03,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:10:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264585488] [2021-07-09 17:10:03,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:03,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:03,113 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:10:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:03,229 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-07-09 17:10:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 35 [2021-07-09 17:10:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:03,248 INFO L225 Difference]: With dead ends: 11397 [2021-07-09 17:10:03,248 INFO L226 Difference]: Without dead ends: 11397 [2021-07-09 17:10:03,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-07-09 17:10:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-07-09 17:10:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-07-09 17:10:03,392 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-07-09 17:10:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:03,392 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-07-09 17:10:03,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:10:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-07-09 17:10:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:03,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:03,400 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:03,606 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-07-09 17:10:03,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603345046] [2021-07-09 17:10:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603345046] [2021-07-09 17:10:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603345046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120729977] [2021-07-09 17:10:03,626 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 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 [2021-07-09 17:10:03,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:03,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120729977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:03,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:10:03,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187977702] [2021-07-09 17:10:03,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:03,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:03,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:03,697 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:10:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:03,788 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-07-09 17:10:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 35 [2021-07-09 17:10:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:03,806 INFO L225 Difference]: With dead ends: 11244 [2021-07-09 17:10:03,806 INFO L226 Difference]: Without dead ends: 11238 [2021-07-09 17:10:03,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-07-09 17:10:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-07-09 17:10:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-07-09 17:10:03,933 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-07-09 17:10:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:03,934 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-07-09 17:10:03,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-07-09 17:10:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-07-09 17:10:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:03,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:03,941 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:04,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 17:10:04,142 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-07-09 17:10:04,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:04,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939387109] [2021-07-09 17:10:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:04,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939387109] [2021-07-09 17:10:04,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939387109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800592608] [2021-07-09 17:10:04,168 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 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 [2021-07-09 17:10:04,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:04,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800592608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:04,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:10:04,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261713139] [2021-07-09 17:10:04,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:04,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:04,236 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-07-09 17:10:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,335 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-07-09 17:10:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 35 [2021-07-09 17:10:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:04,348 INFO L225 Difference]: With dead ends: 9906 [2021-07-09 17:10:04,348 INFO L226 Difference]: Without dead ends: 9894 [2021-07-09 17:10:04,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-07-09 17:10:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-07-09 17:10:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-07-09 17:10:04,494 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-07-09 17:10:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:04,495 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-07-09 17:10:04,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-07-09 17:10:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-07-09 17:10:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:04,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:04,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:04,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:10:04,703 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-07-09 17:10:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:04,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712378404] [2021-07-09 17:10:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:04,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712378404] [2021-07-09 17:10:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712378404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511742411] [2021-07-09 17:10:04,726 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:04,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:10:04,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511742411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:04,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:10:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290004940] [2021-07-09 17:10:04,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:04,800 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:10:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,893 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-07-09 17:10:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 35 [2021-07-09 17:10:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:04,907 INFO L225 Difference]: With dead ends: 10139 [2021-07-09 17:10:04,907 INFO L226 Difference]: Without dead ends: 10139 [2021-07-09 17:10:04,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-07-09 17:10:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-07-09 17:10:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-07-09 17:10:05,028 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-07-09 17:10:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:05,028 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-07-09 17:10:05,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:10:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-07-09 17:10:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:05,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:05,036 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:05,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:05,237 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-07-09 17:10:05,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:05,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928405031] [2021-07-09 17:10:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:05,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:05,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928405031] [2021-07-09 17:10:05,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928405031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003161353] [2021-07-09 17:10:05,257 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:05,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:05,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:05,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:05,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003161353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:10:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416887490] [2021-07-09 17:10:05,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:05,323 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:05,406 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-07-09 17:10:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,420 INFO L225 Difference]: With dead ends: 11101 [2021-07-09 17:10:05,421 INFO L226 Difference]: Without dead ends: 11101 [2021-07-09 17:10:05,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-07-09 17:10:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-07-09 17:10:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-07-09 17:10:05,558 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-07-09 17:10:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:05,558 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-07-09 17:10:05,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-07-09 17:10:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:05,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:05,567 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:10:05,767 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-07-09 17:10:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403786676] [2021-07-09 17:10:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:05,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:05,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403786676] [2021-07-09 17:10:05,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403786676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664260832] [2021-07-09 17:10:05,798 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:05,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:05,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664260832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:10:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934629106] [2021-07-09 17:10:05,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:05,872 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:05,950 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-07-09 17:10:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,964 INFO L225 Difference]: With dead ends: 11074 [2021-07-09 17:10:05,964 INFO L226 Difference]: Without dead ends: 11071 [2021-07-09 17:10:05,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-07-09 17:10:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-07-09 17:10:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-07-09 17:10:06,142 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-07-09 17:10:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:06,143 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-07-09 17:10:06,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-07-09 17:10:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:06,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:06,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,351 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-07-09 17:10:06,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:06,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743071677] [2021-07-09 17:10:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:06,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743071677] [2021-07-09 17:10:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743071677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044974452] [2021-07-09 17:10:06,377 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 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 [2021-07-09 17:10:06,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:06,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044974452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:06,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:10:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362851403] [2021-07-09 17:10:06,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:06,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:06,458 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:06,552 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-07-09 17:10:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:06,566 INFO L225 Difference]: With dead ends: 11098 [2021-07-09 17:10:06,566 INFO L226 Difference]: Without dead ends: 11086 [2021-07-09 17:10:06,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-07-09 17:10:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-07-09 17:10:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-07-09 17:10:06,692 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-07-09 17:10:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:06,693 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-07-09 17:10:06,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-07-09 17:10:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:06,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:06,700 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:06,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 17:10:06,901 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-07-09 17:10:06,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:06,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363387501] [2021-07-09 17:10:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363387501] [2021-07-09 17:10:06,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363387501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234446342] [2021-07-09 17:10:06,926 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:06,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:06,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:10:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234446342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:07,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:07,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627963263] [2021-07-09 17:10:07,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:07,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:07,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:07,000 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,103 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-07-09 17:10:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,119 INFO L225 Difference]: With dead ends: 11062 [2021-07-09 17:10:07,119 INFO L226 Difference]: Without dead ends: 11039 [2021-07-09 17:10:07,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-07-09 17:10:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-07-09 17:10:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-07-09 17:10:07,262 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-07-09 17:10:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,263 INFO L482 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-07-09 17:10:07,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-07-09 17:10:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:10:07,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,271 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:07,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,471 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:07,472 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-07-09 17:10:07,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:07,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587948950] [2021-07-09 17:10:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:07,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587948950] [2021-07-09 17:10:07,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587948950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754269318] [2021-07-09 17:10:07,508 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 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 [2021-07-09 17:10:07,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:10:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754269318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:07,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:10:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916258176] [2021-07-09 17:10:07,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:07,593 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-07-09 17:10:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,766 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-07-09 17:10:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 36 [2021-07-09 17:10:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,780 INFO L225 Difference]: With dead ends: 11977 [2021-07-09 17:10:07,780 INFO L226 Difference]: Without dead ends: 11977 [2021-07-09 17:10:07,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-07-09 17:10:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-07-09 17:10:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-07-09 17:10:07,909 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-07-09 17:10:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,910 INFO L482 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-07-09 17:10:07,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-07-09 17:10:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-07-09 17:10:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:07,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,919 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:08,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 17:10:08,120 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-07-09 17:10:08,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:08,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160212175] [2021-07-09 17:10:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:08,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160212175] [2021-07-09 17:10:08,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160212175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716372615] [2021-07-09 17:10:08,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:08,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:10:08,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:08,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716372615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:08,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:08,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564362380] [2021-07-09 17:10:08,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:08,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:08,502 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:09,079 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-07-09 17:10:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:09,094 INFO L225 Difference]: With dead ends: 11896 [2021-07-09 17:10:09,095 INFO L226 Difference]: Without dead ends: 11879 [2021-07-09 17:10:09,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:10:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-07-09 17:10:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-07-09 17:10:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-07-09 17:10:09,232 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-07-09 17:10:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:09,232 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-07-09 17:10:09,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-07-09 17:10:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:09,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:09,242 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:09,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,443 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-07-09 17:10:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:09,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230818680] [2021-07-09 17:10:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:09,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:09,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230818680] [2021-07-09 17:10:09,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230818680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167095531] [2021-07-09 17:10:09,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:09,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:09,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167095531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:09,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666259321] [2021-07-09 17:10:09,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:09,905 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:10,459 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-07-09 17:10:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:10,477 INFO L225 Difference]: With dead ends: 12194 [2021-07-09 17:10:10,477 INFO L226 Difference]: Without dead ends: 12177 [2021-07-09 17:10:10,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-07-09 17:10:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-07-09 17:10:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-07-09 17:10:10,629 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-07-09 17:10:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:10,629 INFO L482 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-07-09 17:10:10,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-07-09 17:10:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:10,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:10,638 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:10,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 17:10:10,839 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-07-09 17:10:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331969263] [2021-07-09 17:10:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:10,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331969263] [2021-07-09 17:10:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331969263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528350245] [2021-07-09 17:10:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:11,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:11,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528350245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:11,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:11,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813406204] [2021-07-09 17:10:11,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:11,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:11,226 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:11,881 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-07-09 17:10:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:11,897 INFO L225 Difference]: With dead ends: 12640 [2021-07-09 17:10:11,898 INFO L226 Difference]: Without dead ends: 12623 [2021-07-09 17:10:11,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-07-09 17:10:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-07-09 17:10:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-07-09 17:10:12,040 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-07-09 17:10:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:12,040 INFO L482 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-07-09 17:10:12,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-07-09 17:10:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:12,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:12,051 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:12,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:12,253 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-07-09 17:10:12,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:12,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314934384] [2021-07-09 17:10:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:12,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314934384] [2021-07-09 17:10:12,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314934384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806587087] [2021-07-09 17:10:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:12,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:10:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806587087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686346583] [2021-07-09 17:10:12,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:12,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:12,681 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-09 17:10:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:13,567 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-07-09 17:10:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:10:13,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) Word has length 38 [2021-07-09 17:10:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:13,589 INFO L225 Difference]: With dead ends: 15043 [2021-07-09 17:10:13,589 INFO L226 Difference]: Without dead ends: 15009 [2021-07-09 17:10:13,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:10:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-07-09 17:10:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-07-09 17:10:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-07-09 17:10:13,788 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-07-09 17:10:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:13,788 INFO L482 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-07-09 17:10:13,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-09 17:10:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-07-09 17:10:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:13,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:13,799 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:13,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:10:13,999 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:13,999 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-07-09 17:10:13,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:13,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333784414] [2021-07-09 17:10:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:14,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333784414] [2021-07-09 17:10:14,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333784414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673668754] [2021-07-09 17:10:14,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:14,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:14,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673668754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:14,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:10:14,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174651624] [2021-07-09 17:10:14,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:14,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:14,417 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:14,975 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-07-09 17:10:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:14,995 INFO L225 Difference]: With dead ends: 14047 [2021-07-09 17:10:14,995 INFO L226 Difference]: Without dead ends: 14013 [2021-07-09 17:10:14,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-07-09 17:10:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-07-09 17:10:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-07-09 17:10:15,170 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-07-09 17:10:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:15,170 INFO L482 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-07-09 17:10:15,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-07-09 17:10:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:15,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:15,181 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:15,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:10:15,382 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-07-09 17:10:15,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:15,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948858926] [2021-07-09 17:10:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948858926] [2021-07-09 17:10:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948858926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505712609] [2021-07-09 17:10:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:15,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505712609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:15,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055449980] [2021-07-09 17:10:15,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:15,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:15,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:15,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:15,869 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:16,466 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-07-09 17:10:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:16,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:10:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:16,496 INFO L225 Difference]: With dead ends: 16913 [2021-07-09 17:10:16,496 INFO L226 Difference]: Without dead ends: 16870 [2021-07-09 17:10:16,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:10:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-07-09 17:10:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-07-09 17:10:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-07-09 17:10:16,711 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-07-09 17:10:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:16,711 INFO L482 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-07-09 17:10:16,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-07-09 17:10:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:16,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:16,722 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:16,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:10:16,925 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-07-09 17:10:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066762365] [2021-07-09 17:10:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:17,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:17,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066762365] [2021-07-09 17:10:17,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066762365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205343644] [2021-07-09 17:10:17,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:17,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:10:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:17,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:17,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205343644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:17,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495897032] [2021-07-09 17:10:17,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:17,331 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:18,051 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-07-09 17:10:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:18,077 INFO L225 Difference]: With dead ends: 16313 [2021-07-09 17:10:18,077 INFO L226 Difference]: Without dead ends: 16296 [2021-07-09 17:10:18,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-07-09 17:10:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-07-09 17:10:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-07-09 17:10:18,307 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-07-09 17:10:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:18,308 INFO L482 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-07-09 17:10:18,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-07-09 17:10:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:18,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:18,319 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:18,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,520 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:18,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-07-09 17:10:18,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:18,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803416832] [2021-07-09 17:10:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:18,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803416832] [2021-07-09 17:10:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803416832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996355851] [2021-07-09 17:10:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:18,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996355851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:18,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118563510] [2021-07-09 17:10:18,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:18,914 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:19,524 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-07-09 17:10:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:19,548 INFO L225 Difference]: With dead ends: 16694 [2021-07-09 17:10:19,549 INFO L226 Difference]: Without dead ends: 16677 [2021-07-09 17:10:19,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-07-09 17:10:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-07-09 17:10:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-07-09 17:10:19,821 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-07-09 17:10:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:19,821 INFO L482 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-07-09 17:10:19,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-07-09 17:10:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:19,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:19,833 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:20,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:20,033 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-07-09 17:10:20,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:20,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204897919] [2021-07-09 17:10:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:20,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204897919] [2021-07-09 17:10:20,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204897919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681955493] [2021-07-09 17:10:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:20,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:20,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:20,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:20,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681955493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:20,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:20,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311958174] [2021-07-09 17:10:20,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:20,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:20,441 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:21,014 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-07-09 17:10:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:21,041 INFO L225 Difference]: With dead ends: 16910 [2021-07-09 17:10:21,041 INFO L226 Difference]: Without dead ends: 16893 [2021-07-09 17:10:21,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-07-09 17:10:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-07-09 17:10:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-07-09 17:10:21,258 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-07-09 17:10:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:21,259 INFO L482 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-07-09 17:10:21,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-07-09 17:10:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:21,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:21,271 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:21,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:21,471 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-07-09 17:10:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:21,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236567524] [2021-07-09 17:10:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:21,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:21,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236567524] [2021-07-09 17:10:21,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236567524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064754326] [2021-07-09 17:10:21,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:10:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:21,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:21,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064754326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:21,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:10:21,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629246005] [2021-07-09 17:10:21,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:10:21,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:21,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:10:21,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:21,940 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:22,901 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-07-09 17:10:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:10:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) Word has length 38 [2021-07-09 17:10:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:22,929 INFO L225 Difference]: With dead ends: 18935 [2021-07-09 17:10:22,929 INFO L226 Difference]: Without dead ends: 18918 [2021-07-09 17:10:22,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:10:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-07-09 17:10:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-07-09 17:10:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-07-09 17:10:23,165 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-07-09 17:10:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:23,165 INFO L482 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-07-09 17:10:23,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-07-09 17:10:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:23,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:23,177 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:23,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 17:10:23,378 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-07-09 17:10:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:23,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284308423] [2021-07-09 17:10:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:23,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:23,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284308423] [2021-07-09 17:10:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284308423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153915070] [2021-07-09 17:10:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:23,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:23,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153915070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:23,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:10:23,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330927857] [2021-07-09 17:10:23,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:23,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:23,775 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,300 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-07-09 17:10:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:24,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,326 INFO L225 Difference]: With dead ends: 17863 [2021-07-09 17:10:24,326 INFO L226 Difference]: Without dead ends: 17829 [2021-07-09 17:10:24,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:10:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-07-09 17:10:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-07-09 17:10:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-07-09 17:10:24,587 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-07-09 17:10:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:24,587 INFO L482 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-07-09 17:10:24,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-07-09 17:10:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:24,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:24,599 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:24,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:24,800 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-07-09 17:10:24,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:24,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905053621] [2021-07-09 17:10:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:24,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:24,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905053621] [2021-07-09 17:10:24,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905053621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:24,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698665361] [2021-07-09 17:10:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:24,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:10:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:25,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698665361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:25,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:25,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587294496] [2021-07-09 17:10:25,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:25,221 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:25,743 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-07-09 17:10:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:10:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:25,774 INFO L225 Difference]: With dead ends: 20211 [2021-07-09 17:10:25,774 INFO L226 Difference]: Without dead ends: 20168 [2021-07-09 17:10:25,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-07-09 17:10:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-07-09 17:10:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-07-09 17:10:26,035 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-07-09 17:10:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:26,035 INFO L482 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-07-09 17:10:26,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-07-09 17:10:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:26,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:26,049 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:26,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:26,250 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-07-09 17:10:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:26,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563615314] [2021-07-09 17:10:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:26,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563615314] [2021-07-09 17:10:26,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563615314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904127210] [2021-07-09 17:10:26,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:26,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:10:26,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904127210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:26,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379336929] [2021-07-09 17:10:26,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:26,710 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:27,272 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-07-09 17:10:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:27,301 INFO L225 Difference]: With dead ends: 19446 [2021-07-09 17:10:27,302 INFO L226 Difference]: Without dead ends: 19429 [2021-07-09 17:10:27,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-07-09 17:10:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-07-09 17:10:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-07-09 17:10:27,561 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-07-09 17:10:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:27,561 INFO L482 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-07-09 17:10:27,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-07-09 17:10:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:27,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:27,574 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:27,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,775 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-07-09 17:10:27,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:27,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422158016] [2021-07-09 17:10:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:27,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:27,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422158016] [2021-07-09 17:10:27,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422158016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:27,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671784809] [2021-07-09 17:10:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671784809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:28,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661141211] [2021-07-09 17:10:28,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:28,149 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:28,693 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-07-09 17:10:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:28,724 INFO L225 Difference]: With dead ends: 19790 [2021-07-09 17:10:28,724 INFO L226 Difference]: Without dead ends: 19773 [2021-07-09 17:10:28,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-07-09 17:10:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-07-09 17:10:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-07-09 17:10:28,992 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-07-09 17:10:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:28,992 INFO L482 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-07-09 17:10:28,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-07-09 17:10:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:29,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:29,005 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:29,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 17:10:29,206 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-07-09 17:10:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:29,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123663620] [2021-07-09 17:10:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:29,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123663620] [2021-07-09 17:10:29,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123663620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042972318] [2021-07-09 17:10:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:29,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:29,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042972318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:29,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:29,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993898671] [2021-07-09 17:10:29,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:29,588 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:30,204 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-07-09 17:10:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:30,234 INFO L225 Difference]: With dead ends: 20173 [2021-07-09 17:10:30,235 INFO L226 Difference]: Without dead ends: 20156 [2021-07-09 17:10:30,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-07-09 17:10:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-07-09 17:10:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-07-09 17:10:30,544 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-07-09 17:10:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:30,544 INFO L482 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-07-09 17:10:30,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-07-09 17:10:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:30,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:30,557 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:30,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,758 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-07-09 17:10:30,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:30,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290771009] [2021-07-09 17:10:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:30,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:30,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290771009] [2021-07-09 17:10:30,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290771009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998299532] [2021-07-09 17:10:30,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:31,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998299532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:31,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:31,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:31,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255664721] [2021-07-09 17:10:31,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:31,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:31,141 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:31,838 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-07-09 17:10:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:10:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:31,868 INFO L225 Difference]: With dead ends: 20811 [2021-07-09 17:10:31,868 INFO L226 Difference]: Without dead ends: 20777 [2021-07-09 17:10:31,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:10:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-07-09 17:10:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-07-09 17:10:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-07-09 17:10:32,148 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-07-09 17:10:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:32,148 INFO L482 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-07-09 17:10:32,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-07-09 17:10:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:32,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:32,162 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:32,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,363 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-07-09 17:10:32,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:32,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214314101] [2021-07-09 17:10:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:32,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:32,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214314101] [2021-07-09 17:10:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214314101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102863274] [2021-07-09 17:10:32,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:32,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:32,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102863274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:32,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:32,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380182843] [2021-07-09 17:10:32,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:32,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:32,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:32,912 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:33,627 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-07-09 17:10:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:10:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:33,664 INFO L225 Difference]: With dead ends: 23109 [2021-07-09 17:10:33,664 INFO L226 Difference]: Without dead ends: 23066 [2021-07-09 17:10:33,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:10:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-07-09 17:10:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-07-09 17:10:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-07-09 17:10:33,966 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-07-09 17:10:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:33,967 INFO L482 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-07-09 17:10:33,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-07-09 17:10:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:33,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:33,983 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:34,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:10:34,184 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-07-09 17:10:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109907396] [2021-07-09 17:10:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:34,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109907396] [2021-07-09 17:10:34,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109907396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703323032] [2021-07-09 17:10:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:34,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:10:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:34,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703323032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:34,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:10:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931221635] [2021-07-09 17:10:34,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:34,603 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:35,225 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-07-09 17:10:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:10:35,225 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:35,262 INFO L225 Difference]: With dead ends: 23617 [2021-07-09 17:10:35,262 INFO L226 Difference]: Without dead ends: 23583 [2021-07-09 17:10:35,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:10:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-07-09 17:10:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-07-09 17:10:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-07-09 17:10:35,649 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-07-09 17:10:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:35,649 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-07-09 17:10:35,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-07-09 17:10:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:35,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:35,666 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:35,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:35,866 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-07-09 17:10:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:35,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604582943] [2021-07-09 17:10:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:36,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:36,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604582943] [2021-07-09 17:10:36,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604582943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960381312] [2021-07-09 17:10:36,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960381312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:36,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168168225] [2021-07-09 17:10:36,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:36,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:36,253 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:36,834 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-07-09 17:10:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:36,869 INFO L225 Difference]: With dead ends: 22805 [2021-07-09 17:10:36,869 INFO L226 Difference]: Without dead ends: 22788 [2021-07-09 17:10:36,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-07-09 17:10:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-07-09 17:10:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-07-09 17:10:37,171 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-07-09 17:10:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:37,172 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-07-09 17:10:37,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-07-09 17:10:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:37,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:37,188 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:37,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:37,388 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-07-09 17:10:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:37,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417056345] [2021-07-09 17:10:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417056345] [2021-07-09 17:10:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417056345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346122240] [2021-07-09 17:10:37,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:37,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346122240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:37,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80738538] [2021-07-09 17:10:37,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:37,915 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:38,468 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-07-09 17:10:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:38,503 INFO L225 Difference]: With dead ends: 23126 [2021-07-09 17:10:38,503 INFO L226 Difference]: Without dead ends: 23109 [2021-07-09 17:10:38,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-07-09 17:10:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-07-09 17:10:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-07-09 17:10:38,818 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-07-09 17:10:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:38,818 INFO L482 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-07-09 17:10:38,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-07-09 17:10:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:38,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:38,836 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:39,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,037 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-07-09 17:10:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:39,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127757106] [2021-07-09 17:10:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:39,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:39,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127757106] [2021-07-09 17:10:39,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127757106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802155024] [2021-07-09 17:10:39,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:39,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:39,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802155024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:39,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:39,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918711330] [2021-07-09 17:10:39,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:39,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:39,418 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:40,324 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-07-09 17:10:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:10:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:40,363 INFO L225 Difference]: With dead ends: 24322 [2021-07-09 17:10:40,364 INFO L226 Difference]: Without dead ends: 24288 [2021-07-09 17:10:40,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:10:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-07-09 17:10:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-07-09 17:10:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-07-09 17:10:40,693 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-07-09 17:10:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:40,693 INFO L482 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-07-09 17:10:40,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-07-09 17:10:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:40,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:40,710 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:40,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,911 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-07-09 17:10:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962436349] [2021-07-09 17:10:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962436349] [2021-07-09 17:10:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962436349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886124273] [2021-07-09 17:10:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:41,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:10:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:41,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886124273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:41,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991374410] [2021-07-09 17:10:41,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:41,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:41,364 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-09 17:10:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:42,477 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-07-09 17:10:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:10:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) Word has length 38 [2021-07-09 17:10:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:42,525 INFO L225 Difference]: With dead ends: 27871 [2021-07-09 17:10:42,525 INFO L226 Difference]: Without dead ends: 27837 [2021-07-09 17:10:42,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:10:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-07-09 17:10:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-07-09 17:10:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-07-09 17:10:42,982 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-07-09 17:10:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:42,982 INFO L482 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-07-09 17:10:42,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-07-09 17:10:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-07-09 17:10:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:43,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:43,000 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:43,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:43,201 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-07-09 17:10:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124122395] [2021-07-09 17:10:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:43,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:43,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124122395] [2021-07-09 17:10:43,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124122395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970251074] [2021-07-09 17:10:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:43,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:43,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970251074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:43,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:43,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908335052] [2021-07-09 17:10:43,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:43,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:43,655 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:44,613 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-07-09 17:10:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:44,660 INFO L225 Difference]: With dead ends: 28307 [2021-07-09 17:10:44,660 INFO L226 Difference]: Without dead ends: 28255 [2021-07-09 17:10:44,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:10:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-07-09 17:10:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-07-09 17:10:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-07-09 17:10:45,203 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-07-09 17:10:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-07-09 17:10:45,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-07-09 17:10:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:45,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:45,222 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:45,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:45,422 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-07-09 17:10:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:45,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426933559] [2021-07-09 17:10:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:45,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426933559] [2021-07-09 17:10:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426933559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41819590] [2021-07-09 17:10:45,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:45,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:10:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:45,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41819590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:45,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:10:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360737353] [2021-07-09 17:10:45,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:10:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:10:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:45,817 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:46,416 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-07-09 17:10:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:46,550 INFO L225 Difference]: With dead ends: 27788 [2021-07-09 17:10:46,551 INFO L226 Difference]: Without dead ends: 27745 [2021-07-09 17:10:46,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-07-09 17:10:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-07-09 17:10:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-07-09 17:10:46,939 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-07-09 17:10:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:46,940 INFO L482 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-07-09 17:10:46,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-07-09 17:10:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:46,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:46,959 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:47,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:10:47,159 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-07-09 17:10:47,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:47,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625980348] [2021-07-09 17:10:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:47,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:47,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625980348] [2021-07-09 17:10:47,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625980348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718937522] [2021-07-09 17:10:47,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:47,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:47,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:47,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:47,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718937522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:47,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:10:47,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051671240] [2021-07-09 17:10:47,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:10:47,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:10:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:47,637 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:48,946 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-07-09 17:10:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:10:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) Word has length 38 [2021-07-09 17:10:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:49,008 INFO L225 Difference]: With dead ends: 36328 [2021-07-09 17:10:49,008 INFO L226 Difference]: Without dead ends: 36251 [2021-07-09 17:10:49,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 855.8ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:10:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-07-09 17:10:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-07-09 17:10:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-07-09 17:10:49,799 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-07-09 17:10:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-07-09 17:10:49,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-07-09 17:10:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:49,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:49,819 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:50,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,019 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-07-09 17:10:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063393967] [2021-07-09 17:10:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:50,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063393967] [2021-07-09 17:10:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063393967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267402682] [2021-07-09 17:10:50,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:50,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:50,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267402682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:50,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:10:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399242632] [2021-07-09 17:10:50,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:50,413 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:51,220 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-07-09 17:10:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:10:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:51,281 INFO L225 Difference]: With dead ends: 33748 [2021-07-09 17:10:51,281 INFO L226 Difference]: Without dead ends: 33715 [2021-07-09 17:10:51,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:10:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-07-09 17:10:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-07-09 17:10:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-07-09 17:10:51,935 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-07-09 17:10:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:51,936 INFO L482 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-07-09 17:10:51,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-07-09 17:10:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:51,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:51,961 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:52,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 17:10:52,177 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-07-09 17:10:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:52,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098914560] [2021-07-09 17:10:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:52,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098914560] [2021-07-09 17:10:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098914560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095282138] [2021-07-09 17:10:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095282138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:52,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 17:10:52,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803040636] [2021-07-09 17:10:52,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:52,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:52,706 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-07-09 17:10:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:53,314 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-07-09 17:10:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:10:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) Word has length 38 [2021-07-09 17:10:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:53,370 INFO L225 Difference]: With dead ends: 35110 [2021-07-09 17:10:53,370 INFO L226 Difference]: Without dead ends: 35069 [2021-07-09 17:10:53,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-07-09 17:10:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-07-09 17:10:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-07-09 17:10:53,892 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-07-09 17:10:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:53,893 INFO L482 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-07-09 17:10:53,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-07-09 17:10:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-07-09 17:10:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:53,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:53,912 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:54,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:10:54,113 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-07-09 17:10:54,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:54,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350246724] [2021-07-09 17:10:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:54,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:54,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350246724] [2021-07-09 17:10:54,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350246724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265046620] [2021-07-09 17:10:54,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:54,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:54,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265046620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:54,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:10:54,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81196783] [2021-07-09 17:10:54,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:10:54,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:54,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:10:54,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:10:54,717 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:56,095 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-07-09 17:10:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:10:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) Word has length 38 [2021-07-09 17:10:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:56,163 INFO L225 Difference]: With dead ends: 40688 [2021-07-09 17:10:56,164 INFO L226 Difference]: Without dead ends: 40654 [2021-07-09 17:10:56,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:10:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-07-09 17:10:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-07-09 17:10:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-07-09 17:10:56,781 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-07-09 17:10:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:56,781 INFO L482 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-07-09 17:10:56,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2021-07-09 17:10:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-07-09 17:10:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:56,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:56,802 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:57,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,002 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:57,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-07-09 17:10:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:57,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234575214] [2021-07-09 17:10:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:57,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234575214] [2021-07-09 17:10:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234575214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715773210] [2021-07-09 17:10:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715773210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:57,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:10:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576386813] [2021-07-09 17:10:57,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:10:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:10:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:10:57,512 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:58,331 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-07-09 17:10:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:10:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:58,399 INFO L225 Difference]: With dead ends: 40320 [2021-07-09 17:10:58,399 INFO L226 Difference]: Without dead ends: 40277 [2021-07-09 17:10:58,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:10:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-07-09 17:10:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-07-09 17:10:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-07-09 17:10:59,052 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-07-09 17:10:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:59,053 INFO L482 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-07-09 17:10:59,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:10:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-07-09 17:10:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:59,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:59,073 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:59,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:59,273 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-07-09 17:10:59,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:59,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174050365] [2021-07-09 17:10:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:59,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:59,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174050365] [2021-07-09 17:10:59,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174050365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:59,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369137511] [2021-07-09 17:10:59,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:59,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:10:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369137511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:59,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:59,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:10:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864191114] [2021-07-09 17:10:59,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:10:59,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:10:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:10:59,693 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:00,512 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-07-09 17:11:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:00,586 INFO L225 Difference]: With dead ends: 39152 [2021-07-09 17:11:00,586 INFO L226 Difference]: Without dead ends: 39118 [2021-07-09 17:11:00,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:11:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-07-09 17:11:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-07-09 17:11:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-07-09 17:11:01,297 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-07-09 17:11:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:01,297 INFO L482 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-07-09 17:11:01,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-07-09 17:11:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:01,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:01,317 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:01,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:01,518 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-07-09 17:11:01,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:01,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376437366] [2021-07-09 17:11:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:01,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376437366] [2021-07-09 17:11:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376437366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119549871] [2021-07-09 17:11:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:01,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:01,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:01,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119549871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:01,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:01,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:01,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719541378] [2021-07-09 17:11:01,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:01,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:01,977 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:02,788 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-07-09 17:11:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:02,850 INFO L225 Difference]: With dead ends: 39710 [2021-07-09 17:11:02,850 INFO L226 Difference]: Without dead ends: 39676 [2021-07-09 17:11:02,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-07-09 17:11:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-07-09 17:11:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-07-09 17:11:03,498 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-07-09 17:11:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:03,498 INFO L482 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-07-09 17:11:03,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-07-09 17:11:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:03,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:03,521 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:03,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 17:11:03,722 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-07-09 17:11:03,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:03,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5237785] [2021-07-09 17:11:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:03,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5237785] [2021-07-09 17:11:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5237785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:03,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928297073] [2021-07-09 17:11:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:04,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928297073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:04,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:11:04,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528935099] [2021-07-09 17:11:04,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:11:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:11:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:11:04,267 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:05,056 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-07-09 17:11:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:05,125 INFO L225 Difference]: With dead ends: 41067 [2021-07-09 17:11:05,125 INFO L226 Difference]: Without dead ends: 41033 [2021-07-09 17:11:05,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:11:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-07-09 17:11:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-07-09 17:11:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-07-09 17:11:05,718 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-07-09 17:11:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:05,718 INFO L482 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-07-09 17:11:05,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-07-09 17:11:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:05,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:05,740 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:05,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:05,940 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-07-09 17:11:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:05,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229167788] [2021-07-09 17:11:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:06,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:06,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229167788] [2021-07-09 17:11:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229167788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:06,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262844792] [2021-07-09 17:11:06,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:06,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:06,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262844792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:06,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:06,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:11:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545041882] [2021-07-09 17:11:06,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:11:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:11:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:11:06,518 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:11:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:07,338 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-07-09 17:11:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:11:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:11:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:07,426 INFO L225 Difference]: With dead ends: 42419 [2021-07-09 17:11:07,426 INFO L226 Difference]: Without dead ends: 42376 [2021-07-09 17:11:07,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 703.2ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:11:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-07-09 17:11:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-07-09 17:11:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-07-09 17:11:08,086 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-07-09 17:11:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:08,086 INFO L482 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-07-09 17:11:08,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:11:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-07-09 17:11:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:08,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:08,109 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:08,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-09 17:11:08,309 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-07-09 17:11:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:08,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114929518] [2021-07-09 17:11:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:08,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:08,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114929518] [2021-07-09 17:11:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114929518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555526238] [2021-07-09 17:11:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:08,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:08,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555526238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:08,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:08,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855358382] [2021-07-09 17:11:08,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:08,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:08,875 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:09,638 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-07-09 17:11:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:09,714 INFO L225 Difference]: With dead ends: 40507 [2021-07-09 17:11:09,715 INFO L226 Difference]: Without dead ends: 40490 [2021-07-09 17:11:09,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:11:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-07-09 17:11:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-07-09 17:11:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-07-09 17:11:10,380 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-07-09 17:11:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:10,380 INFO L482 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-07-09 17:11:10,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-07-09 17:11:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:10,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:10,402 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:10,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:10,603 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-07-09 17:11:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:10,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124503448] [2021-07-09 17:11:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:10,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:10,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124503448] [2021-07-09 17:11:10,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124503448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:10,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335185617] [2021-07-09 17:11:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:10,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:11,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335185617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:11,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:11,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483886315] [2021-07-09 17:11:11,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:11,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:11,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:11,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:11,078 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:11,749 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-07-09 17:11:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:11:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:11,815 INFO L225 Difference]: With dead ends: 40827 [2021-07-09 17:11:11,815 INFO L226 Difference]: Without dead ends: 40810 [2021-07-09 17:11:11,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:11:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-07-09 17:11:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-07-09 17:11:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-07-09 17:11:12,527 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-07-09 17:11:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:12,527 INFO L482 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-07-09 17:11:12,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-07-09 17:11:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:12,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:12,548 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:12,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:12,749 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-07-09 17:11:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637027867] [2021-07-09 17:11:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:12,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:12,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637027867] [2021-07-09 17:11:12,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637027867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:12,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006551983] [2021-07-09 17:11:12,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:12,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:12,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:13,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006551983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:13,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:11:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048079486] [2021-07-09 17:11:13,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:11:13,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:11:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:11:13,279 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:14,124 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-07-09 17:11:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:11:14,125 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:14,187 INFO L225 Difference]: With dead ends: 41685 [2021-07-09 17:11:14,187 INFO L226 Difference]: Without dead ends: 41668 [2021-07-09 17:11:14,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 639.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:11:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-07-09 17:11:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-07-09 17:11:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-07-09 17:11:14,950 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-07-09 17:11:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:14,950 INFO L482 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-07-09 17:11:14,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-07-09 17:11:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:14,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:14,971 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:15,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 17:11:15,184 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-07-09 17:11:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:15,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684987422] [2021-07-09 17:11:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:15,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684987422] [2021-07-09 17:11:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684987422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305502094] [2021-07-09 17:11:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:15,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:15,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:15,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:15,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305502094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:15,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:15,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:15,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301844475] [2021-07-09 17:11:15,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:15,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:15,555 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:16,265 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-07-09 17:11:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:16,334 INFO L225 Difference]: With dead ends: 41871 [2021-07-09 17:11:16,334 INFO L226 Difference]: Without dead ends: 41837 [2021-07-09 17:11:16,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-07-09 17:11:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-07-09 17:11:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-07-09 17:11:17,033 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-07-09 17:11:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:17,033 INFO L482 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-07-09 17:11:17,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-07-09 17:11:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:17,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:17,056 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:17,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:11:17,257 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-07-09 17:11:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:17,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758410009] [2021-07-09 17:11:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:17,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758410009] [2021-07-09 17:11:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758410009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005455631] [2021-07-09 17:11:17,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:17,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005455631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:17,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:17,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:11:17,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753649855] [2021-07-09 17:11:17,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:11:17,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:11:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:11:17,679 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:18,568 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-07-09 17:11:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:18,734 INFO L225 Difference]: With dead ends: 43352 [2021-07-09 17:11:18,735 INFO L226 Difference]: Without dead ends: 43318 [2021-07-09 17:11:18,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:11:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-07-09 17:11:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-07-09 17:11:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-07-09 17:11:19,310 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-07-09 17:11:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:19,311 INFO L482 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-07-09 17:11:19,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-07-09 17:11:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:19,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:19,333 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:19,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:19,534 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-07-09 17:11:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:19,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784401815] [2021-07-09 17:11:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:19,687 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-09 17:11:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:19,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:19,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784401815] [2021-07-09 17:11:19,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784401815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:19,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639571332] [2021-07-09 17:11:19,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:19,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:20,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639571332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:20,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 17:11:20,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372859687] [2021-07-09 17:11:20,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:11:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:20,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:11:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:11:20,065 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:11:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:20,847 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-07-09 17:11:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:11:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-07-09 17:11:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:20,924 INFO L225 Difference]: With dead ends: 44617 [2021-07-09 17:11:20,924 INFO L226 Difference]: Without dead ends: 44574 [2021-07-09 17:11:20,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-07-09 17:11:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-07-09 17:11:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-07-09 17:11:21,720 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-07-09 17:11:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:21,720 INFO L482 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-07-09 17:11:21,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-09 17:11:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-07-09 17:11:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:21,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:21,744 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:21,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:11:21,945 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-07-09 17:11:21,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:21,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101892291] [2021-07-09 17:11:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:22,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:22,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101892291] [2021-07-09 17:11:22,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101892291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362821974] [2021-07-09 17:11:22,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:22,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:22,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362821974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:22,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:22,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778622716] [2021-07-09 17:11:22,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:22,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:22,332 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:22,998 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-07-09 17:11:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:22,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:23,075 INFO L225 Difference]: With dead ends: 43750 [2021-07-09 17:11:23,076 INFO L226 Difference]: Without dead ends: 43733 [2021-07-09 17:11:23,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:11:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-07-09 17:11:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-07-09 17:11:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-07-09 17:11:23,888 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-07-09 17:11:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:23,888 INFO L482 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-07-09 17:11:23,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-07-09 17:11:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:11:23,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:23,912 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:24,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:11:24,113 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-07-09 17:11:24,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:24,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858219398] [2021-07-09 17:11:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:24,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858219398] [2021-07-09 17:11:24,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858219398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475064875] [2021-07-09 17:11:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:24,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:24,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:11:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:24,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475064875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:24,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:11:24,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734349856] [2021-07-09 17:11:24,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:24,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:24,486 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:25,139 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-07-09 17:11:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:11:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:11:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:25,215 INFO L225 Difference]: With dead ends: 44087 [2021-07-09 17:11:25,215 INFO L226 Difference]: Without dead ends: 44070 [2021-07-09 17:11:25,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:11:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-07-09 17:11:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-07-09 17:11:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-07-09 17:11:26,006 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-07-09 17:11:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:26,006 INFO L482 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-07-09 17:11:26,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-07-09 17:11:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:26,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:26,028 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:26,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:11:26,229 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-07-09 17:11:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:26,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129066553] [2021-07-09 17:11:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:26,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129066553] [2021-07-09 17:11:26,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129066553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915248891] [2021-07-09 17:11:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:26,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:26,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:26,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:26,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915248891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:26,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:11:26,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612480968] [2021-07-09 17:11:26,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:11:26,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:26,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:11:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:11:26,336 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:26,598 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-07-09 17:11:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:26,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:11:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:26,705 INFO L225 Difference]: With dead ends: 54955 [2021-07-09 17:11:26,706 INFO L226 Difference]: Without dead ends: 54921 [2021-07-09 17:11:26,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-07-09 17:11:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-07-09 17:11:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-07-09 17:11:27,748 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-07-09 17:11:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:27,748 INFO L482 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-07-09 17:11:27,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-07-09 17:11:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:27,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:27,937 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:28,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:28,138 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-07-09 17:11:28,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:28,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296265828] [2021-07-09 17:11:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:28,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296265828] [2021-07-09 17:11:28,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296265828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405991376] [2021-07-09 17:11:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:28,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:11:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:28,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405991376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:28,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:11:28,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200565287] [2021-07-09 17:11:28,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:11:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:11:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:11:28,224 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:28,443 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-07-09 17:11:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 17:11:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:28,547 INFO L225 Difference]: With dead ends: 54798 [2021-07-09 17:11:28,547 INFO L226 Difference]: Without dead ends: 54798 [2021-07-09 17:11:28,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-07-09 17:11:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-07-09 17:11:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-07-09 17:11:29,602 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-07-09 17:11:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:29,602 INFO L482 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-07-09 17:11:29,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-07-09 17:11:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:29,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:29,626 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:29,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 17:11:29,826 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-07-09 17:11:29,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:29,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551877683] [2021-07-09 17:11:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:29,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551877683] [2021-07-09 17:11:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551877683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960018437] [2021-07-09 17:11:29,846 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960018437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:29,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:11:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092832553] [2021-07-09 17:11:29,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:11:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:11:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:11:29,909 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:11:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:30,289 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-07-09 17:11:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:11:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 39 [2021-07-09 17:11:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:30,381 INFO L225 Difference]: With dead ends: 51794 [2021-07-09 17:11:30,381 INFO L226 Difference]: Without dead ends: 51790 [2021-07-09 17:11:30,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-07-09 17:11:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-07-09 17:11:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-07-09 17:11:31,374 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-07-09 17:11:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:31,374 INFO L482 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-07-09 17:11:31,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:11:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-07-09 17:11:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:31,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:31,398 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:31,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:11:31,598 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-07-09 17:11:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:31,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049454382] [2021-07-09 17:11:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:31,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:31,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049454382] [2021-07-09 17:11:31,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049454382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769877462] [2021-07-09 17:11:31,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:31,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:11:31,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769877462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:31,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:11:31,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736792642] [2021-07-09 17:11:31,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:11:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:11:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:11:31,711 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:11:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:31,953 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-07-09 17:11:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 39 [2021-07-09 17:11:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:32,056 INFO L225 Difference]: With dead ends: 53808 [2021-07-09 17:11:32,056 INFO L226 Difference]: Without dead ends: 53805 [2021-07-09 17:11:32,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-07-09 17:11:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-07-09 17:11:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-07-09 17:11:33,127 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-07-09 17:11:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:33,127 INFO L482 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-07-09 17:11:33,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:11:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-07-09 17:11:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:33,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:33,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:33,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:11:33,350 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-07-09 17:11:33,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:33,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223893738] [2021-07-09 17:11:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:33,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:33,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223893738] [2021-07-09 17:11:33,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223893738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656085909] [2021-07-09 17:11:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:11:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656085909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:33,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:11:33,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534904207] [2021-07-09 17:11:33,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:11:33,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:11:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:33,618 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:11:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:33,848 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-07-09 17:11:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 39 [2021-07-09 17:11:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:33,945 INFO L225 Difference]: With dead ends: 52855 [2021-07-09 17:11:33,945 INFO L226 Difference]: Without dead ends: 52852 [2021-07-09 17:11:33,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-07-09 17:11:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-07-09 17:11:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-07-09 17:11:34,975 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-07-09 17:11:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:34,975 INFO L482 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-07-09 17:11:34,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:11:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-07-09 17:11:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:34,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:34,998 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:35,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,198 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-07-09 17:11:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:35,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093882284] [2021-07-09 17:11:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:35,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093882284] [2021-07-09 17:11:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093882284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919609832] [2021-07-09 17:11:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:35,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:35,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919609832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:35,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:11:35,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489427629] [2021-07-09 17:11:35,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:11:35,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:11:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:35,285 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-07-09 17:11:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:35,518 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-07-09 17:11:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 39 [2021-07-09 17:11:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:35,776 INFO L225 Difference]: With dead ends: 50891 [2021-07-09 17:11:35,776 INFO L226 Difference]: Without dead ends: 50871 [2021-07-09 17:11:35,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-07-09 17:11:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-07-09 17:11:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-07-09 17:11:36,592 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-07-09 17:11:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:36,592 INFO L482 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-07-09 17:11:36,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-07-09 17:11:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-07-09 17:11:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:36,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:36,615 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:36,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,817 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-07-09 17:11:36,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:36,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589908482] [2021-07-09 17:11:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:36,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:36,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589908482] [2021-07-09 17:11:36,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589908482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:36,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953644433] [2021-07-09 17:11:36,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:36,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:36,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:37,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953644433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:37,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:37,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:11:37,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835643104] [2021-07-09 17:11:37,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:11:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:11:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:11:37,056 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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) [2021-07-09 17:11:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:37,286 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-07-09 17:11:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:11:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 39 [2021-07-09 17:11:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:37,393 INFO L225 Difference]: With dead ends: 51054 [2021-07-09 17:11:37,393 INFO L226 Difference]: Without dead ends: 51050 [2021-07-09 17:11:37,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-07-09 17:11:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-07-09 17:11:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-07-09 17:11:38,502 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-07-09 17:11:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:38,502 INFO L482 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-07-09 17:11:38,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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) [2021-07-09 17:11:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-07-09 17:11:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:38,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:38,525 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:38,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,741 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-07-09 17:11:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740682215] [2021-07-09 17:11:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:38,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740682215] [2021-07-09 17:11:38,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740682215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022402642] [2021-07-09 17:11:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:11:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:38,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022402642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:38,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:11:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455255344] [2021-07-09 17:11:38,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:11:38,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:11:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:11:38,833 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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) [2021-07-09 17:11:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:39,055 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-07-09 17:11:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 39 [2021-07-09 17:11:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:39,156 INFO L225 Difference]: With dead ends: 52488 [2021-07-09 17:11:39,156 INFO L226 Difference]: Without dead ends: 52485 [2021-07-09 17:11:39,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-07-09 17:11:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-07-09 17:11:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-07-09 17:11:40,209 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-07-09 17:11:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:40,209 INFO L482 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-07-09 17:11:40,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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) [2021-07-09 17:11:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-07-09 17:11:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:40,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:40,232 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:40,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 17:11:40,433 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-07-09 17:11:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997907869] [2021-07-09 17:11:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997907869] [2021-07-09 17:11:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997907869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249882579] [2021-07-09 17:11:40,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:11:40,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249882579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:40,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:11:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012859850] [2021-07-09 17:11:40,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:11:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:11:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:40,525 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-07-09 17:11:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:40,934 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-07-09 17:11:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 39 [2021-07-09 17:11:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:41,048 INFO L225 Difference]: With dead ends: 52380 [2021-07-09 17:11:41,049 INFO L226 Difference]: Without dead ends: 52368 [2021-07-09 17:11:41,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-07-09 17:11:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-07-09 17:11:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-07-09 17:11:41,882 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-07-09 17:11:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:41,882 INFO L482 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-07-09 17:11:41,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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) [2021-07-09 17:11:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-07-09 17:11:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:11:41,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:41,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:42,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:11:42,106 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-07-09 17:11:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:42,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590428565] [2021-07-09 17:11:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:42,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:42,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590428565] [2021-07-09 17:11:42,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590428565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188815353] [2021-07-09 17:11:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:42,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:42,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:11:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:42,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188815353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:42,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:11:42,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831745589] [2021-07-09 17:11:42,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:11:42,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:11:42,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:11:42,201 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-09 17:11:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:42,613 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-07-09 17:11:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 39 [2021-07-09 17:11:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:42,712 INFO L225 Difference]: With dead ends: 51895 [2021-07-09 17:11:42,712 INFO L226 Difference]: Without dead ends: 51883 [2021-07-09 17:11:42,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-07-09 17:11:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-07-09 17:11:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-07-09 17:11:43,708 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-07-09 17:11:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:43,708 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-07-09 17:11:43,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-09 17:11:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-07-09 17:11:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 17:11:43,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:43,730 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:43,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:11:43,930 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-07-09 17:11:43,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:43,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584313951] [2021-07-09 17:11:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 17:11:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584313951] [2021-07-09 17:11:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584313951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859434116] [2021-07-09 17:11:44,013 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-07-09 17:11:44,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859434116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:44,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:11:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975893355] [2021-07-09 17:11:44,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:11:44,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:11:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:44,145 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:44,606 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-07-09 17:11:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 17:11:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:44,827 INFO L225 Difference]: With dead ends: 50941 [2021-07-09 17:11:44,827 INFO L226 Difference]: Without dead ends: 50818 [2021-07-09 17:11:44,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:11:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-07-09 17:11:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-07-09 17:11:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-07-09 17:11:45,609 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-07-09 17:11:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:45,609 INFO L482 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-07-09 17:11:45,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-07-09 17:11:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:45,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:45,634 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:45,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:11:45,834 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-07-09 17:11:45,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:45,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585035287] [2021-07-09 17:11:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585035287] [2021-07-09 17:11:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585035287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577783011] [2021-07-09 17:11:45,881 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:45,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:11:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:11:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:46,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577783011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:46,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:46,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:11:46,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893197024] [2021-07-09 17:11:46,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:11:46,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:11:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:11:46,015 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:46,483 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-07-09 17:11:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:11:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:46,586 INFO L225 Difference]: With dead ends: 54165 [2021-07-09 17:11:46,587 INFO L226 Difference]: Without dead ends: 54165 [2021-07-09 17:11:46,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:11:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-07-09 17:11:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-07-09 17:11:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-07-09 17:11:47,338 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-07-09 17:11:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:47,338 INFO L482 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-07-09 17:11:47,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-07-09 17:11:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:47,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:47,358 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:47,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 17:11:47,559 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-07-09 17:11:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:47,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745308775] [2021-07-09 17:11:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745308775] [2021-07-09 17:11:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745308775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787830786] [2021-07-09 17:11:47,616 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:47,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:11:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:47,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787830786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:47,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:11:47,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382889589] [2021-07-09 17:11:47,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:11:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:11:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:11:47,732 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-07-09 17:11:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:48,176 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-07-09 17:11:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:11:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) Word has length 41 [2021-07-09 17:11:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:48,230 INFO L225 Difference]: With dead ends: 34622 [2021-07-09 17:11:48,230 INFO L226 Difference]: Without dead ends: 34550 [2021-07-09 17:11:48,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:11:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-07-09 17:11:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-07-09 17:11:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-07-09 17:11:48,746 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-07-09 17:11:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:48,746 INFO L482 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-07-09 17:11:48,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-07-09 17:11:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-07-09 17:11:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:48,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:48,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:48,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,966 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-07-09 17:11:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:48,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861621562] [2021-07-09 17:11:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:49,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861621562] [2021-07-09 17:11:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861621562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241421105] [2021-07-09 17:11:49,109 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:49,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:49,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:49,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241421105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:49,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:11:49,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856369844] [2021-07-09 17:11:49,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:11:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:11:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:49,339 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:49,720 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-07-09 17:11:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:50,070 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-07-09 17:11:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:11:50,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:50,123 INFO L225 Difference]: With dead ends: 33955 [2021-07-09 17:11:50,123 INFO L226 Difference]: Without dead ends: 33895 [2021-07-09 17:11:50,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 594.3ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:11:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-07-09 17:11:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-07-09 17:11:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-07-09 17:11:50,629 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-07-09 17:11:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:50,629 INFO L482 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-07-09 17:11:50,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-07-09 17:11:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:50,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:50,650 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:50,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:11:50,850 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-07-09 17:11:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:50,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300970083] [2021-07-09 17:11:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:50,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:50,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300970083] [2021-07-09 17:11:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300970083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190412391] [2021-07-09 17:11:50,981 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:51,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:11:51,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:51,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190412391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:51,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:11:51,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258909339] [2021-07-09 17:11:51,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:11:51,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:11:51,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:51,210 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:51,989 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-07-09 17:11:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:52,041 INFO L225 Difference]: With dead ends: 34237 [2021-07-09 17:11:52,041 INFO L226 Difference]: Without dead ends: 34177 [2021-07-09 17:11:52,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:11:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-07-09 17:11:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-07-09 17:11:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-07-09 17:11:52,571 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-07-09 17:11:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:52,571 INFO L482 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-07-09 17:11:52,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-07-09 17:11:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:52,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:52,594 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:52,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:52,795 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-07-09 17:11:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:52,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868362853] [2021-07-09 17:11:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868362853] [2021-07-09 17:11:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868362853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885255956] [2021-07-09 17:11:52,920 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885255956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:53,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:53,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-07-09 17:11:53,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465283125] [2021-07-09 17:11:53,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:11:53,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:53,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:11:53,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:53,135 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:53,893 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-07-09 17:11:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:11:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:53,942 INFO L225 Difference]: With dead ends: 35020 [2021-07-09 17:11:53,942 INFO L226 Difference]: Without dead ends: 34968 [2021-07-09 17:11:53,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:11:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-07-09 17:11:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-07-09 17:11:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-07-09 17:11:54,381 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-07-09 17:11:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:54,381 INFO L482 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-07-09 17:11:54,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-07-09 17:11:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:54,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:54,513 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:54,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:54,713 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-07-09 17:11:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:54,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076303442] [2021-07-09 17:11:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:54,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:54,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076303442] [2021-07-09 17:11:54,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076303442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:54,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765655823] [2021-07-09 17:11:54,838 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:54,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:55,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765655823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:55,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:11:55,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845538561] [2021-07-09 17:11:55,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:11:55,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:55,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:11:55,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:55,070 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:55,581 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-07-09 17:11:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:11:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:55,638 INFO L225 Difference]: With dead ends: 35348 [2021-07-09 17:11:55,638 INFO L226 Difference]: Without dead ends: 35287 [2021-07-09 17:11:55,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:11:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-07-09 17:11:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-07-09 17:11:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-07-09 17:11:56,143 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-07-09 17:11:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:56,143 INFO L482 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-07-09 17:11:56,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-07-09 17:11:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:56,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:56,164 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:56,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-09 17:11:56,365 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-07-09 17:11:56,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:56,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554066248] [2021-07-09 17:11:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554066248] [2021-07-09 17:11:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554066248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067089606] [2021-07-09 17:11:56,484 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:56,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:11:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:56,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067089606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:56,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:11:56,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120627303] [2021-07-09 17:11:56,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:11:56,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:56,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:11:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:56,727 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:57,484 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-07-09 17:11:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:57,543 INFO L225 Difference]: With dead ends: 37628 [2021-07-09 17:11:57,543 INFO L226 Difference]: Without dead ends: 37564 [2021-07-09 17:11:57,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-07-09 17:11:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-07-09 17:11:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-07-09 17:11:58,100 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-07-09 17:11:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:58,101 INFO L482 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-07-09 17:11:58,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-07-09 17:11:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:58,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:58,122 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:58,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:58,324 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-07-09 17:11:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:58,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204434984] [2021-07-09 17:11:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:58,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:58,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204434984] [2021-07-09 17:11:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204434984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262254644] [2021-07-09 17:11:58,456 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:58,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:58,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:58,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:11:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:58,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262254644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:58,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-07-09 17:11:58,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422697150] [2021-07-09 17:11:58,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:11:58,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:11:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:58,670 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:59,314 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-07-09 17:11:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:11:59,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:11:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:59,508 INFO L225 Difference]: With dead ends: 37468 [2021-07-09 17:11:59,509 INFO L226 Difference]: Without dead ends: 37424 [2021-07-09 17:11:59,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:11:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-07-09 17:11:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-07-09 17:11:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-07-09 17:11:59,964 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-07-09 17:11:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:59,964 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-07-09 17:11:59,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-07-09 17:11:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:11:59,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:59,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:00,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,188 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-07-09 17:12:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:00,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41211590] [2021-07-09 17:12:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:00,377 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 17:12:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:00,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:00,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41211590] [2021-07-09 17:12:00,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41211590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004202084] [2021-07-09 17:12:00,445 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:12:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:00,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004202084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:00,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:12:00,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889975819] [2021-07-09 17:12:00,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:00,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:00,688 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:01,418 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-07-09 17:12:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:12:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:01,482 INFO L225 Difference]: With dead ends: 37883 [2021-07-09 17:12:01,482 INFO L226 Difference]: Without dead ends: 37825 [2021-07-09 17:12:01,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:12:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-07-09 17:12:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-07-09 17:12:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-07-09 17:12:02,036 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-07-09 17:12:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:02,036 INFO L482 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-07-09 17:12:02,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-07-09 17:12:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:02,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:02,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:02,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 17:12:02,260 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-07-09 17:12:02,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:02,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30194065] [2021-07-09 17:12:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:02,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:02,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30194065] [2021-07-09 17:12:02,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30194065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:02,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27823473] [2021-07-09 17:12:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:02,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:12:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:02,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27823473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:02,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:02,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:12:02,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432955923] [2021-07-09 17:12:02,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:02,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:02,613 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:03,581 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-07-09 17:12:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:12:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:03,648 INFO L225 Difference]: With dead ends: 42560 [2021-07-09 17:12:03,648 INFO L226 Difference]: Without dead ends: 42505 [2021-07-09 17:12:03,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:12:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-07-09 17:12:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-07-09 17:12:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-07-09 17:12:04,273 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-07-09 17:12:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:04,273 INFO L482 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-07-09 17:12:04,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-07-09 17:12:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:04,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:04,297 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:04,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:04,498 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-07-09 17:12:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:04,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627455529] [2021-07-09 17:12:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:04,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:04,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627455529] [2021-07-09 17:12:04,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627455529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:04,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148142291] [2021-07-09 17:12:04,622 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148142291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:04,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:04,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:12:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615925203] [2021-07-09 17:12:04,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:04,857 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:05,341 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-07-09 17:12:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:05,575 INFO L225 Difference]: With dead ends: 42177 [2021-07-09 17:12:05,575 INFO L226 Difference]: Without dead ends: 42122 [2021-07-09 17:12:05,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-07-09 17:12:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-07-09 17:12:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-07-09 17:12:06,185 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-07-09 17:12:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:06,186 INFO L482 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-07-09 17:12:06,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-07-09 17:12:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:06,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:06,211 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:12:06,412 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-07-09 17:12:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:06,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802628359] [2021-07-09 17:12:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:06,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:06,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802628359] [2021-07-09 17:12:06,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802628359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866674607] [2021-07-09 17:12:06,535 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:06,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:06,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:06,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866674607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:06,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:06,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415212707] [2021-07-09 17:12:06,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:06,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:06,782 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:07,419 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-07-09 17:12:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:07,494 INFO L225 Difference]: With dead ends: 43200 [2021-07-09 17:12:07,494 INFO L226 Difference]: Without dead ends: 43139 [2021-07-09 17:12:07,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-07-09 17:12:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-07-09 17:12:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-07-09 17:12:08,113 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-07-09 17:12:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:08,113 INFO L482 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-07-09 17:12:08,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-07-09 17:12:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:08,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:08,139 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:08,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:08,341 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-07-09 17:12:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:08,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134861864] [2021-07-09 17:12:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:08,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:08,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134861864] [2021-07-09 17:12:08,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134861864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:08,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136577896] [2021-07-09 17:12:08,464 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:08,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:12:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136577896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:08,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081091668] [2021-07-09 17:12:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:08,731 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:09,678 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-07-09 17:12:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:12:09,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:09,755 INFO L225 Difference]: With dead ends: 43593 [2021-07-09 17:12:09,755 INFO L226 Difference]: Without dead ends: 43522 [2021-07-09 17:12:09,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:12:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-07-09 17:12:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-07-09 17:12:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-07-09 17:12:10,394 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-07-09 17:12:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:10,394 INFO L482 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-07-09 17:12:10,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-07-09 17:12:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:10,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:10,419 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 17:12:10,621 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:10,621 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-07-09 17:12:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:10,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958994390] [2021-07-09 17:12:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:10,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958994390] [2021-07-09 17:12:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958994390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893452934] [2021-07-09 17:12:10,741 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:10,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893452934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:10,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51695055] [2021-07-09 17:12:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:10,996 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:11,326 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-07-09 17:12:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:11,807 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-07-09 17:12:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:11,878 INFO L225 Difference]: With dead ends: 44838 [2021-07-09 17:12:11,878 INFO L226 Difference]: Without dead ends: 44755 [2021-07-09 17:12:11,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:12:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-07-09 17:12:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-07-09 17:12:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-07-09 17:12:12,517 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-07-09 17:12:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:12,517 INFO L482 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-07-09 17:12:12,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-07-09 17:12:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:12,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:12,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:12,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,744 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:12,744 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-07-09 17:12:12,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:12,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447172666] [2021-07-09 17:12:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:12,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447172666] [2021-07-09 17:12:12,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447172666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751359702] [2021-07-09 17:12:12,862 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:12:12,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751359702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:13,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:13,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:13,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952597000] [2021-07-09 17:12:13,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:13,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:13,121 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:13,813 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-07-09 17:12:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:13,884 INFO L225 Difference]: With dead ends: 45004 [2021-07-09 17:12:13,884 INFO L226 Difference]: Without dead ends: 44951 [2021-07-09 17:12:13,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:12:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-07-09 17:12:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-07-09 17:12:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-07-09 17:12:14,566 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-07-09 17:12:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:14,566 INFO L482 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-07-09 17:12:14,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-07-09 17:12:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:14,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:14,594 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:14,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:12:14,795 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-07-09 17:12:14,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:14,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603473729] [2021-07-09 17:12:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:14,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:14,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603473729] [2021-07-09 17:12:14,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603473729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164507485] [2021-07-09 17:12:14,936 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:12:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:14,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:15,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164507485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:15,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:15,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:15,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987714480] [2021-07-09 17:12:15,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:15,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:15,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:15,196 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:15,970 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-07-09 17:12:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:12:15,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:16,045 INFO L225 Difference]: With dead ends: 47479 [2021-07-09 17:12:16,045 INFO L226 Difference]: Without dead ends: 47408 [2021-07-09 17:12:16,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:12:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-07-09 17:12:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-07-09 17:12:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-07-09 17:12:16,773 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-07-09 17:12:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:16,773 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-07-09 17:12:16,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-07-09 17:12:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:16,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:16,799 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:16,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,999 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-07-09 17:12:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47337502] [2021-07-09 17:12:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:17,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:17,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47337502] [2021-07-09 17:12:17,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47337502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985341713] [2021-07-09 17:12:17,122 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985341713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:17,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-07-09 17:12:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990086073] [2021-07-09 17:12:17,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:12:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:12:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:17,336 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:17,943 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-07-09 17:12:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:12:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:18,170 INFO L225 Difference]: With dead ends: 44309 [2021-07-09 17:12:18,171 INFO L226 Difference]: Without dead ends: 44269 [2021-07-09 17:12:18,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-07-09 17:12:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-07-09 17:12:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-07-09 17:12:18,809 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-07-09 17:12:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:18,809 INFO L482 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-07-09 17:12:18,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-07-09 17:12:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:18,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:18,835 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:19,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,036 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-07-09 17:12:19,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:19,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060807139] [2021-07-09 17:12:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:19,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060807139] [2021-07-09 17:12:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060807139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566662150] [2021-07-09 17:12:19,156 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:19,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:19,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566662150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:19,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:12:19,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081484785] [2021-07-09 17:12:19,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:19,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:19,399 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:20,080 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-07-09 17:12:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:20,146 INFO L225 Difference]: With dead ends: 44985 [2021-07-09 17:12:20,146 INFO L226 Difference]: Without dead ends: 44934 [2021-07-09 17:12:20,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:12:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-07-09 17:12:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-07-09 17:12:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-07-09 17:12:20,838 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-07-09 17:12:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:20,838 INFO L482 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-07-09 17:12:20,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-07-09 17:12:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:20,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:20,866 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:21,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,066 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:21,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-07-09 17:12:21,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:21,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383278656] [2021-07-09 17:12:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:21,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383278656] [2021-07-09 17:12:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383278656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495859261] [2021-07-09 17:12:21,191 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:12:21,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495859261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:21,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:21,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872219232] [2021-07-09 17:12:21,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:21,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:21,450 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:22,387 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-07-09 17:12:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:12:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:22,478 INFO L225 Difference]: With dead ends: 49164 [2021-07-09 17:12:22,478 INFO L226 Difference]: Without dead ends: 49079 [2021-07-09 17:12:22,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:12:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-07-09 17:12:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-07-09 17:12:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-07-09 17:12:23,322 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-07-09 17:12:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:23,323 INFO L482 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-07-09 17:12:23,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-07-09 17:12:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:23,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:23,356 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:23,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:12:23,572 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-07-09 17:12:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:23,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236488301] [2021-07-09 17:12:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:23,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236488301] [2021-07-09 17:12:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236488301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519381104] [2021-07-09 17:12:23,690 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:23,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:23,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519381104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:23,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:12:23,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845184599] [2021-07-09 17:12:23,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:23,930 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:24,676 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-07-09 17:12:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:24,756 INFO L225 Difference]: With dead ends: 48735 [2021-07-09 17:12:24,757 INFO L226 Difference]: Without dead ends: 48700 [2021-07-09 17:12:24,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:12:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-07-09 17:12:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-07-09 17:12:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-07-09 17:12:25,486 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-07-09 17:12:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:25,486 INFO L482 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-07-09 17:12:25,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-07-09 17:12:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:25,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:25,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:25,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:12:25,720 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-07-09 17:12:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:25,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848572313] [2021-07-09 17:12:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:25,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:25,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848572313] [2021-07-09 17:12:25,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848572313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:25,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557517036] [2021-07-09 17:12:25,975 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:25,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:12:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:25,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557517036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:26,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 17:12:26,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633241497] [2021-07-09 17:12:26,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:12:26,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:12:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:26,208 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:26,814 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-07-09 17:12:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:26,906 INFO L225 Difference]: With dead ends: 51644 [2021-07-09 17:12:26,906 INFO L226 Difference]: Without dead ends: 51544 [2021-07-09 17:12:26,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:12:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-07-09 17:12:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-07-09 17:12:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-07-09 17:12:27,734 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-07-09 17:12:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:27,734 INFO L482 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-07-09 17:12:27,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-07-09 17:12:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:27,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:27,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:27,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:12:27,967 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-07-09 17:12:27,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:27,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468163170] [2021-07-09 17:12:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:28,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468163170] [2021-07-09 17:12:28,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468163170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773803891] [2021-07-09 17:12:28,105 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:28,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:12:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773803891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:28,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 17:12:28,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489300561] [2021-07-09 17:12:28,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:28,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:28,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:28,364 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:29,122 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-07-09 17:12:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:29,223 INFO L225 Difference]: With dead ends: 50673 [2021-07-09 17:12:29,223 INFO L226 Difference]: Without dead ends: 50620 [2021-07-09 17:12:29,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:12:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-07-09 17:12:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-07-09 17:12:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-07-09 17:12:30,026 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-07-09 17:12:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:30,026 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-07-09 17:12:30,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-07-09 17:12:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:30,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:30,060 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:30,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:12:30,260 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-07-09 17:12:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:30,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243154554] [2021-07-09 17:12:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:30,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243154554] [2021-07-09 17:12:30,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243154554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864071613] [2021-07-09 17:12:30,382 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:30,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:30,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864071613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:30,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-09 17:12:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476219412] [2021-07-09 17:12:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:12:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:12:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:30,623 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:31,380 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-07-09 17:12:31,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:31,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-09 17:12:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:31,474 INFO L225 Difference]: With dead ends: 50981 [2021-07-09 17:12:31,474 INFO L226 Difference]: Without dead ends: 50938 [2021-07-09 17:12:31,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:12:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-07-09 17:12:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-07-09 17:12:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-07-09 17:12:32,412 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-07-09 17:12:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:32,412 INFO L482 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-07-09 17:12:32,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-07-09 17:12:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 17:12:32,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:32,463 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:32,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 17:12:32,677 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-07-09 17:12:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:32,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579167714] [2021-07-09 17:12:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:32,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:32,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579167714] [2021-07-09 17:12:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579167714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192585957] [2021-07-09 17:12:32,811 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)