/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:30:44,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:30:44,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:30:44,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:30:44,701 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 [2021-05-21 20:30:44,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:30:44,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:30:44,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:30:44,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:30:44,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:30:44,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:30:44,730 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:30:44,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:30:44,730 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:30:44,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:30:44,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:30:44,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:30:44,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:30:44,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:30:44,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:30:44,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:30:44,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:30:44,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:30:44,956 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:30:44,957 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:30:44,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-05-21 20:30:44,957 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-05-21 20:30:44,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:30:44,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:30:44,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:30:44,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:30:44,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:30:45,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:30:45,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:30:45,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:30:45,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:30:45,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/1) ... [2021-05-21 20:30:45,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:30:45,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:30:45,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:30:45,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:30:45,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (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 [2021-05-21 20:30:45,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:30:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:30:45,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:30:45,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:30:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:30:45,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:30:45,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:30:45,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:30:45,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:30:45,082 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:30:45,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:30:45,226 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:30:45,227 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:30:45 BoogieIcfgContainer [2021-05-21 20:30:45,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:30:45,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:30:45,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:30:45,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:30:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:30:44" (1/2) ... [2021-05-21 20:30:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b72646 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:30:45, skipping insertion in model container [2021-05-21 20:30:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:30:45" (2/2) ... [2021-05-21 20:30:45,241 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-05-21 20:30:45,244 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:30:45,244 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:30:45,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:30:45,245 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:30:45,265 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-21 20:30:45,278 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 20:30:45,290 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:30:45,291 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:30:45,291 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:30:45,291 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:30:45,291 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:30:45,291 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:30:45,291 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:30:45,291 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:30:45,297 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-05-21 20:30:45,306 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:30:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:30:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-21 20:30:45,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:45,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:45,313 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:45,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1207424972, now seen corresponding path program 1 times [2021-05-21 20:30:45,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352005305] [2021-05-21 20:30:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352005305] [2021-05-21 20:30:45,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352005305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:30:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:30:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:30:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327690930] [2021-05-21 20:30:45,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:30:45,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:30:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:30:45,484 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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) [2021-05-21 20:30:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:45,514 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-05-21 20:30:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:30:45,515 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 [2021-05-21 20:30:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:45,523 INFO L225 Difference]: With dead ends: 99 [2021-05-21 20:30:45,523 INFO L226 Difference]: Without dead ends: 92 [2021-05-21 20:30:45,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:30:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-21 20:30:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-05-21 20:30:45,558 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) [2021-05-21 20:30:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-05-21 20:30:45,561 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-05-21 20:30:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:45,561 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-05-21 20:30:45,561 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) [2021-05-21 20:30:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-05-21 20:30:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:30:45,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:45,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:45,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:30:45,564 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash -680974379, now seen corresponding path program 1 times [2021-05-21 20:30:45,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:45,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706174373] [2021-05-21 20:30:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:45,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:45,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706174373] [2021-05-21 20:30:45,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706174373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:30:45,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:30:45,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:30:45,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827302402] [2021-05-21 20:30:45,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:30:45,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:45,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:30:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:30:45,622 INFO L87 Difference]: Start difference. First operand 80 states and 164 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) [2021-05-21 20:30:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:45,674 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-05-21 20:30:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:30:45,674 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 [2021-05-21 20:30:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:45,677 INFO L225 Difference]: With dead ends: 138 [2021-05-21 20:30:45,678 INFO L226 Difference]: Without dead ends: 131 [2021-05-21 20:30:45,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:30:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-21 20:30:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-05-21 20:30:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:30:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-05-21 20:30:45,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-05-21 20:30:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:45,691 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-05-21 20:30:45,691 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) [2021-05-21 20:30:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-05-21 20:30:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:30:45,692 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:45,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:45,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:30:45,692 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 2 times [2021-05-21 20:30:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:45,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381564507] [2021-05-21 20:30:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:45,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:45,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381564507] [2021-05-21 20:30:45,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381564507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:45,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101992814] [2021-05-21 20:30:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:45,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:30:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:45,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:30:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101992814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:45,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:45,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 20:30:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208499174] [2021-05-21 20:30:45,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:30:45,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:45,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:30:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:30:45,832 INFO L87 Difference]: Start difference. First operand 93 states and 189 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) [2021-05-21 20:30:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:45,877 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-21 20:30:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:30:45,877 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 [2021-05-21 20:30:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:45,882 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:30:45,882 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 20:30:45,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:30:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 20:30:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-05-21 20:30:45,896 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) [2021-05-21 20:30:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-05-21 20:30:45,897 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-05-21 20:30:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:45,897 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-05-21 20:30:45,897 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) [2021-05-21 20:30:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-05-21 20:30:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:30:45,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:45,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:46,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 20:30:46,105 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-05-21 20:30:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:46,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313256347] [2021-05-21 20:30:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:46,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313256347] [2021-05-21 20:30:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313256347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:46,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073049719] [2021-05-21 20:30:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:30:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073049719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:46,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:46,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:30:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568976724] [2021-05-21 20:30:46,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:30:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:30:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:30:46,416 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) [2021-05-21 20:30:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:46,615 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-05-21 20:30:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:30:46,616 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 [2021-05-21 20:30:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:46,617 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:30:46,617 INFO L226 Difference]: Without dead ends: 153 [2021-05-21 20:30:46,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:30:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-21 20:30:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-05-21 20:30:46,620 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) [2021-05-21 20:30:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-05-21 20:30:46,626 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-05-21 20:30:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:46,626 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-05-21 20:30:46,626 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) [2021-05-21 20:30:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-05-21 20:30:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:30:46,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:46,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:46,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:46,848 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-05-21 20:30:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:46,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469697155] [2021-05-21 20:30:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:46,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:46,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469697155] [2021-05-21 20:30:46,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469697155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:30:46,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:30:46,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:30:46,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416401870] [2021-05-21 20:30:46,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:30:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:30:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:30:46,876 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) [2021-05-21 20:30:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:46,894 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-05-21 20:30:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:30:46,895 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 [2021-05-21 20:30:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:46,896 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:30:46,896 INFO L226 Difference]: Without dead ends: 139 [2021-05-21 20:30:46,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:30:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-21 20:30:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-05-21 20:30:46,900 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) [2021-05-21 20:30:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-05-21 20:30:46,900 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-05-21 20:30:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:46,900 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-05-21 20:30:46,900 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) [2021-05-21 20:30:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-05-21 20:30:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:46,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:46,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:46,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:30:46,901 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-05-21 20:30:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:46,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840943104] [2021-05-21 20:30:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:46,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840943104] [2021-05-21 20:30:46,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840943104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343134703] [2021-05-21 20:30:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:46,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:30:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:46,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:30:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:47,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343134703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:47,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:47,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:30:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716309666] [2021-05-21 20:30:47,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:30:47,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:30:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:30:47,019 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) [2021-05-21 20:30:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:47,117 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-05-21 20:30:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:30:47,118 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 [2021-05-21 20:30:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:47,122 INFO L225 Difference]: With dead ends: 323 [2021-05-21 20:30:47,122 INFO L226 Difference]: Without dead ends: 323 [2021-05-21 20:30:47,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:30:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-21 20:30:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-05-21 20:30:47,128 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) [2021-05-21 20:30:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-05-21 20:30:47,129 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-05-21 20:30:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:47,129 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-05-21 20:30:47,129 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) [2021-05-21 20:30:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-05-21 20:30:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:47,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:47,133 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:47,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:47,338 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-05-21 20:30:47,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:47,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067546571] [2021-05-21 20:30:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:47,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067546571] [2021-05-21 20:30:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067546571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:47,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21608435] [2021-05-21 20:30:47,492 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 [2021-05-21 20:30:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:30:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:47,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21608435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:47,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:47,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-21 20:30:47,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201793627] [2021-05-21 20:30:47,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:30:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:30:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:30:47,639 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) [2021-05-21 20:30:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:48,002 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-05-21 20:30:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:30:48,002 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 [2021-05-21 20:30:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:48,004 INFO L225 Difference]: With dead ends: 526 [2021-05-21 20:30:48,004 INFO L226 Difference]: Without dead ends: 519 [2021-05-21 20:30:48,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:30:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-21 20:30:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-05-21 20:30:48,013 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) [2021-05-21 20:30:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-05-21 20:30:48,014 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-05-21 20:30:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:48,014 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-05-21 20:30:48,014 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) [2021-05-21 20:30:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-05-21 20:30:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:48,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:48,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:48,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:48,233 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-05-21 20:30:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:48,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193679239] [2021-05-21 20:30:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:48,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:48,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193679239] [2021-05-21 20:30:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193679239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:48,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828227712] [2021-05-21 20:30:48,328 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 [2021-05-21 20:30:48,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:30:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:30:48,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:48,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828227712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:48,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:48,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-21 20:30:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886700275] [2021-05-21 20:30:48,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:30:48,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:30:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:30:48,470 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) [2021-05-21 20:30:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:48,775 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-05-21 20:30:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:30:48,775 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 [2021-05-21 20:30:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:48,778 INFO L225 Difference]: With dead ends: 636 [2021-05-21 20:30:48,778 INFO L226 Difference]: Without dead ends: 629 [2021-05-21 20:30:48,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:30:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-21 20:30:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-05-21 20:30:48,787 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) [2021-05-21 20:30:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-05-21 20:30:48,788 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-05-21 20:30:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:48,789 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-05-21 20:30:48,789 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) [2021-05-21 20:30:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-05-21 20:30:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:48,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:48,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:49,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:49,005 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-05-21 20:30:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:49,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096874834] [2021-05-21 20:30:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:49,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096874834] [2021-05-21 20:30:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096874834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132888872] [2021-05-21 20:30:49,106 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 [2021-05-21 20:30:49,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:30:49,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:30:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:30:49,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132888872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:49,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:49,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-21 20:30:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400193689] [2021-05-21 20:30:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:30:49,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:30:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:30:49,242 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) [2021-05-21 20:30:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:49,476 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-05-21 20:30:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:30:49,477 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 [2021-05-21 20:30:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:49,480 INFO L225 Difference]: With dead ends: 772 [2021-05-21 20:30:49,480 INFO L226 Difference]: Without dead ends: 758 [2021-05-21 20:30:49,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:30:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-05-21 20:30:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-05-21 20:30:49,493 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) [2021-05-21 20:30:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-05-21 20:30:49,495 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-05-21 20:30:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:49,495 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-05-21 20:30:49,496 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) [2021-05-21 20:30:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-05-21 20:30:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:49,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:49,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:49,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:49,713 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-05-21 20:30:49,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:49,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111272859] [2021-05-21 20:30:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:49,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:49,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111272859] [2021-05-21 20:30:49,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111272859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:49,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538919099] [2021-05-21 20:30:49,828 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) [2021-05-21 20:30:49,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:30:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:30:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538919099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:49,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:49,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-21 20:30:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622052493] [2021-05-21 20:30:49,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:30:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:30:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:30:49,965 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) [2021-05-21 20:30:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:50,187 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-05-21 20:30:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:30:50,187 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 [2021-05-21 20:30:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:50,189 INFO L225 Difference]: With dead ends: 760 [2021-05-21 20:30:50,189 INFO L226 Difference]: Without dead ends: 753 [2021-05-21 20:30:50,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:30:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-05-21 20:30:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-05-21 20:30:50,200 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) [2021-05-21 20:30:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-05-21 20:30:50,202 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-05-21 20:30:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:50,202 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-05-21 20:30:50,202 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) [2021-05-21 20:30:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-05-21 20:30:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:30:50,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:50,203 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:30:50,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 20:30:50,417 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-05-21 20:30:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22965713] [2021-05-21 20:30:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:50,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22965713] [2021-05-21 20:30:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22965713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860558956] [2021-05-21 20:30:50,523 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) [2021-05-21 20:30:50,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:30:50,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:50,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:30:50,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:50,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860558956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:50,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:50,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-21 20:30:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696390331] [2021-05-21 20:30:50,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:30:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:30:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:30:50,650 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) [2021-05-21 20:30:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:50,902 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-05-21 20:30:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:30:50,903 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 [2021-05-21 20:30:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:50,905 INFO L225 Difference]: With dead ends: 812 [2021-05-21 20:30:50,905 INFO L226 Difference]: Without dead ends: 805 [2021-05-21 20:30:50,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:30:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-05-21 20:30:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-05-21 20:30:50,917 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) [2021-05-21 20:30:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-05-21 20:30:50,919 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-05-21 20:30:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:50,919 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-05-21 20:30:50,919 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) [2021-05-21 20:30:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-05-21 20:30:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:50,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:50,920 INFO L521 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] [2021-05-21 20:30:51,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 20:30:51,140 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-05-21 20:30:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476876757] [2021-05-21 20:30:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:51,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:51,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476876757] [2021-05-21 20:30:51,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476876757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:51,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571000404] [2021-05-21 20:30:51,285 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 [2021-05-21 20:30:51,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:30:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571000404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:51,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198910691] [2021-05-21 20:30:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:51,446 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) [2021-05-21 20:30:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:51,995 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-05-21 20:30:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:30:51,996 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 [2021-05-21 20:30:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:52,000 INFO L225 Difference]: With dead ends: 1425 [2021-05-21 20:30:52,000 INFO L226 Difference]: Without dead ends: 1411 [2021-05-21 20:30:52,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:30:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-05-21 20:30:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-05-21 20:30:52,017 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) [2021-05-21 20:30:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-05-21 20:30:52,018 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-05-21 20:30:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:52,019 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-05-21 20:30:52,019 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) [2021-05-21 20:30:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-05-21 20:30:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:52,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:52,020 INFO L521 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] [2021-05-21 20:30:52,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:52,237 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-05-21 20:30:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:52,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108341375] [2021-05-21 20:30:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:52,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108341375] [2021-05-21 20:30:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108341375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459466136] [2021-05-21 20:30:52,259 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 [2021-05-21 20:30:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:30:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:30:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459466136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:52,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:52,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:30:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749220547] [2021-05-21 20:30:52,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:30:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:30:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:30:52,311 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) [2021-05-21 20:30:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:52,350 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-05-21 20:30:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:30:52,350 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 [2021-05-21 20:30:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:52,354 INFO L225 Difference]: With dead ends: 1306 [2021-05-21 20:30:52,354 INFO L226 Difference]: Without dead ends: 1303 [2021-05-21 20:30:52,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:30:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-05-21 20:30:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-05-21 20:30:52,369 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) [2021-05-21 20:30:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-05-21 20:30:52,371 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-05-21 20:30:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:52,371 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-05-21 20:30:52,371 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) [2021-05-21 20:30:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-05-21 20:30:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:52,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:52,373 INFO L521 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] [2021-05-21 20:30:52,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:52,590 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-05-21 20:30:52,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:52,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5074512] [2021-05-21 20:30:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:52,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5074512] [2021-05-21 20:30:52,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5074512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:52,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346734146] [2021-05-21 20:30:52,610 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 [2021-05-21 20:30:52,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:30:52,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:30:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:30:52,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346734146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:52,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:52,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:30:52,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935860148] [2021-05-21 20:30:52,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:30:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:52,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:30:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:30:52,670 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) [2021-05-21 20:30:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:52,709 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-05-21 20:30:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:30:52,710 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 [2021-05-21 20:30:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:52,715 INFO L225 Difference]: With dead ends: 1948 [2021-05-21 20:30:52,715 INFO L226 Difference]: Without dead ends: 1948 [2021-05-21 20:30:52,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:30:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-05-21 20:30:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-05-21 20:30:52,739 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) [2021-05-21 20:30:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-05-21 20:30:52,741 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-05-21 20:30:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:52,741 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-05-21 20:30:52,742 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) [2021-05-21 20:30:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-05-21 20:30:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:52,744 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:52,744 INFO L521 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] [2021-05-21 20:30:52,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:30:52,957 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-05-21 20:30:52,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037022801] [2021-05-21 20:30:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:52,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:52,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037022801] [2021-05-21 20:30:52,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037022801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:52,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565298671] [2021-05-21 20:30:52,975 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 [2021-05-21 20:30:52,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:30:52,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:30:52,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:30:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565298671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:53,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:53,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:30:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008989609] [2021-05-21 20:30:53,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:30:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:30:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:30:53,029 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) [2021-05-21 20:30:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:53,069 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-05-21 20:30:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:30:53,069 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 [2021-05-21 20:30:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:53,075 INFO L225 Difference]: With dead ends: 1941 [2021-05-21 20:30:53,075 INFO L226 Difference]: Without dead ends: 1938 [2021-05-21 20:30:53,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:30:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-05-21 20:30:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-05-21 20:30:53,099 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) [2021-05-21 20:30:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-05-21 20:30:53,102 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-05-21 20:30:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:53,102 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-05-21 20:30:53,102 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) [2021-05-21 20:30:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-05-21 20:30:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:53,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:53,105 INFO L521 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] [2021-05-21 20:30:53,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 20:30:53,321 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-05-21 20:30:53,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:53,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993841713] [2021-05-21 20:30:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:53,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993841713] [2021-05-21 20:30:53,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993841713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:53,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235429909] [2021-05-21 20:30:53,340 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) [2021-05-21 20:30:53,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:30:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:53,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:30:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:53,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235429909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:53,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:53,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:30:53,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86646691] [2021-05-21 20:30:53,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:30:53,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:30:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:30:53,404 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) [2021-05-21 20:30:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:53,454 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-05-21 20:30:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:30:53,454 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 [2021-05-21 20:30:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:53,459 INFO L225 Difference]: With dead ends: 1932 [2021-05-21 20:30:53,459 INFO L226 Difference]: Without dead ends: 1918 [2021-05-21 20:30:53,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:30:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-05-21 20:30:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-05-21 20:30:53,482 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) [2021-05-21 20:30:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-05-21 20:30:53,502 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-05-21 20:30:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:53,502 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-05-21 20:30:53,502 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) [2021-05-21 20:30:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-05-21 20:30:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:53,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:53,504 INFO L521 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] [2021-05-21 20:30:53,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:30:53,720 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-05-21 20:30:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:53,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707450148] [2021-05-21 20:30:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:53,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707450148] [2021-05-21 20:30:53,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707450148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:53,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455991642] [2021-05-21 20:30:53,838 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 [2021-05-21 20:30:53,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:30:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:53,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455991642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:53,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:53,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619713056] [2021-05-21 20:30:53,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:53,996 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) [2021-05-21 20:30:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:54,591 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-05-21 20:30:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:30:54,592 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 [2021-05-21 20:30:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:54,598 INFO L225 Difference]: With dead ends: 2667 [2021-05-21 20:30:54,599 INFO L226 Difference]: Without dead ends: 2634 [2021-05-21 20:30:54,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:30:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-05-21 20:30:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-05-21 20:30:54,629 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) [2021-05-21 20:30:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-05-21 20:30:54,647 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-05-21 20:30:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:54,647 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-05-21 20:30:54,647 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) [2021-05-21 20:30:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-05-21 20:30:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:54,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:54,650 INFO L521 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] [2021-05-21 20:30:54,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:54,865 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-05-21 20:30:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989402596] [2021-05-21 20:30:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:54,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989402596] [2021-05-21 20:30:54,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989402596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348177584] [2021-05-21 20:30:54,981 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:30:55,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:30:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:55,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348177584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:55,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:55,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:55,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879592898] [2021-05-21 20:30:55,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:55,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:55,150 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) [2021-05-21 20:30:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:55,701 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-05-21 20:30:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:30:55,701 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 [2021-05-21 20:30:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:55,709 INFO L225 Difference]: With dead ends: 2799 [2021-05-21 20:30:55,709 INFO L226 Difference]: Without dead ends: 2766 [2021-05-21 20:30:55,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:30:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-05-21 20:30:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-05-21 20:30:55,752 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) [2021-05-21 20:30:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-05-21 20:30:55,755 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-05-21 20:30:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:55,756 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-05-21 20:30:55,756 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) [2021-05-21 20:30:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-05-21 20:30:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:55,759 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:55,759 INFO L521 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] [2021-05-21 20:30:55,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:30:55,973 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-05-21 20:30:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:55,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7135720] [2021-05-21 20:30:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:56,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:56,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7135720] [2021-05-21 20:30:56,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7135720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:56,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774319238] [2021-05-21 20:30:56,084 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 [2021-05-21 20:30:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:56,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774319238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:56,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:56,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:56,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156938607] [2021-05-21 20:30:56,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:56,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:56,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:56,247 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) [2021-05-21 20:30:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:56,803 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-05-21 20:30:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:30:56,804 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 [2021-05-21 20:30:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:56,808 INFO L225 Difference]: With dead ends: 3085 [2021-05-21 20:30:56,808 INFO L226 Difference]: Without dead ends: 3052 [2021-05-21 20:30:56,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:30:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-05-21 20:30:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-05-21 20:30:56,857 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) [2021-05-21 20:30:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-05-21 20:30:56,862 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-05-21 20:30:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:56,862 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-05-21 20:30:56,862 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) [2021-05-21 20:30:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-05-21 20:30:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:56,865 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:56,865 INFO L521 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] [2021-05-21 20:30:57,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:57,081 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-05-21 20:30:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:57,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330455072] [2021-05-21 20:30:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330455072] [2021-05-21 20:30:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330455072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581994068] [2021-05-21 20:30:57,183 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 [2021-05-21 20:30:57,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:30:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:30:57,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581994068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:57,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:57,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754643014] [2021-05-21 20:30:57,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:57,346 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) [2021-05-21 20:30:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:57,871 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-05-21 20:30:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:30:57,871 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 [2021-05-21 20:30:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:57,877 INFO L225 Difference]: With dead ends: 3403 [2021-05-21 20:30:57,877 INFO L226 Difference]: Without dead ends: 3367 [2021-05-21 20:30:57,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:30:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-05-21 20:30:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-05-21 20:30:57,919 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) [2021-05-21 20:30:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-05-21 20:30:57,924 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-05-21 20:30:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:57,924 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-05-21 20:30:57,924 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) [2021-05-21 20:30:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-05-21 20:30:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:57,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:57,928 INFO L521 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] [2021-05-21 20:30:58,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:30:58,144 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-05-21 20:30:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:58,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649749] [2021-05-21 20:30:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:58,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:58,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649749] [2021-05-21 20:30:58,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:58,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922338138] [2021-05-21 20:30:58,259 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 [2021-05-21 20:30:58,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:30:58,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:58,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922338138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:58,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:58,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:58,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766862166] [2021-05-21 20:30:58,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:58,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:58,416 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) [2021-05-21 20:30:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:58,828 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-05-21 20:30:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:30:58,829 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 [2021-05-21 20:30:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:58,833 INFO L225 Difference]: With dead ends: 3443 [2021-05-21 20:30:58,833 INFO L226 Difference]: Without dead ends: 3410 [2021-05-21 20:30:58,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:30:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-05-21 20:30:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-05-21 20:30:58,875 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) [2021-05-21 20:30:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-05-21 20:30:58,880 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-05-21 20:30:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-05-21 20:30:58,880 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) [2021-05-21 20:30:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-05-21 20:30:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:58,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:58,884 INFO L521 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] [2021-05-21 20:30:59,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 20:30:59,100 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:30:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:30:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-05-21 20:30:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:30:59,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214307155] [2021-05-21 20:30:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:30:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:30:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:30:59,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:30:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214307155] [2021-05-21 20:30:59,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214307155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:59,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605987080] [2021-05-21 20:30:59,219 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 [2021-05-21 20:30:59,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:30:59,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:30:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:30:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:30:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:30:59,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605987080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:30:59,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:30:59,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:30:59,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832866924] [2021-05-21 20:30:59,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:30:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:30:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:30:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:30:59,372 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) [2021-05-21 20:30:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:30:59,777 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-05-21 20:30:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:30:59,778 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 [2021-05-21 20:30:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:30:59,782 INFO L225 Difference]: With dead ends: 3520 [2021-05-21 20:30:59,782 INFO L226 Difference]: Without dead ends: 3507 [2021-05-21 20:30:59,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:30:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-05-21 20:30:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-05-21 20:30:59,833 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) [2021-05-21 20:30:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-05-21 20:30:59,843 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-05-21 20:30:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:30:59,843 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-05-21 20:30:59,844 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) [2021-05-21 20:30:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-05-21 20:30:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:30:59,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:30:59,848 INFO L521 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] [2021-05-21 20:31:00,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:00,061 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-05-21 20:31:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:00,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144004446] [2021-05-21 20:31:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:00,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144004446] [2021-05-21 20:31:00,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144004446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822957927] [2021-05-21 20:31:00,182 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 [2021-05-21 20:31:00,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:31:00,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:00,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822957927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:00,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:00,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:00,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158826035] [2021-05-21 20:31:00,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:00,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:00,339 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) [2021-05-21 20:31:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:00,751 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-05-21 20:31:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:31:00,751 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 [2021-05-21 20:31:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:00,757 INFO L225 Difference]: With dead ends: 3850 [2021-05-21 20:31:00,757 INFO L226 Difference]: Without dead ends: 3817 [2021-05-21 20:31:00,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:31:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-05-21 20:31:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-05-21 20:31:00,789 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) [2021-05-21 20:31:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-05-21 20:31:00,825 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-05-21 20:31:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:00,825 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-05-21 20:31:00,825 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) [2021-05-21 20:31:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-05-21 20:31:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:31:00,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:00,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:01,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 20:31:01,037 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-05-21 20:31:01,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:01,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172483007] [2021-05-21 20:31:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:01,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172483007] [2021-05-21 20:31:01,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172483007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818457694] [2021-05-21 20:31:01,124 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:01,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 20:31:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:01,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818457694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:01,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:01,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:31:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603357700] [2021-05-21 20:31:01,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:31:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:31:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:31:01,227 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) [2021-05-21 20:31:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:01,413 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-05-21 20:31:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:31:01,413 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 [2021-05-21 20:31:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:01,427 INFO L225 Difference]: With dead ends: 3385 [2021-05-21 20:31:01,427 INFO L226 Difference]: Without dead ends: 3093 [2021-05-21 20:31:01,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-05-21 20:31:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-05-21 20:31:01,453 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) [2021-05-21 20:31:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-05-21 20:31:01,457 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-05-21 20:31:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:01,458 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-05-21 20:31:01,458 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) [2021-05-21 20:31:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-05-21 20:31:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:31:01,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:01,461 INFO L521 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] [2021-05-21 20:31:01,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 20:31:01,669 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-05-21 20:31:01,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:01,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912770287] [2021-05-21 20:31:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:01,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912770287] [2021-05-21 20:31:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912770287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728144289] [2021-05-21 20:31:01,795 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 [2021-05-21 20:31:01,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:31:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:31:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:01,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728144289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:01,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:01,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 20:31:01,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997270644] [2021-05-21 20:31:01,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:31:01,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:01,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:31:01,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:31:01,983 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) [2021-05-21 20:31:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:02,696 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-05-21 20:31:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:31:02,697 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 [2021-05-21 20:31:02,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:02,700 INFO L225 Difference]: With dead ends: 3805 [2021-05-21 20:31:02,700 INFO L226 Difference]: Without dead ends: 3772 [2021-05-21 20:31:02,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:31:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-05-21 20:31:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-05-21 20:31:02,732 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) [2021-05-21 20:31:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-05-21 20:31:02,736 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-05-21 20:31:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-05-21 20:31:02,737 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) [2021-05-21 20:31:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-05-21 20:31:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:31:02,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:02,740 INFO L521 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] [2021-05-21 20:31:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:02,953 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-05-21 20:31:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299831680] [2021-05-21 20:31:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:03,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299831680] [2021-05-21 20:31:03,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299831680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215353276] [2021-05-21 20:31:03,111 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 [2021-05-21 20:31:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:31:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:03,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215353276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:03,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:03,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 20:31:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789941070] [2021-05-21 20:31:03,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:31:03,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:31:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:31:03,351 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) [2021-05-21 20:31:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:03,978 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-05-21 20:31:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:31:03,978 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 [2021-05-21 20:31:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:03,981 INFO L225 Difference]: With dead ends: 3901 [2021-05-21 20:31:03,981 INFO L226 Difference]: Without dead ends: 3868 [2021-05-21 20:31:03,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:31:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-05-21 20:31:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-05-21 20:31:04,012 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) [2021-05-21 20:31:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-05-21 20:31:04,017 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-05-21 20:31:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:04,017 INFO L482 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-05-21 20:31:04,017 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) [2021-05-21 20:31:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-05-21 20:31:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:31:04,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:04,021 INFO L521 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] [2021-05-21 20:31:04,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:31:04,236 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-05-21 20:31:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:04,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5630021] [2021-05-21 20:31:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:04,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:04,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5630021] [2021-05-21 20:31:04,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5630021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:04,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990210143] [2021-05-21 20:31:04,384 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 [2021-05-21 20:31:04,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:31:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990210143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:04,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:04,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:31:04,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777903786] [2021-05-21 20:31:04,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:04,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:04,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:04,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:04,606 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) [2021-05-21 20:31:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:05,363 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-05-21 20:31:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:31:05,363 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 [2021-05-21 20:31:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:05,367 INFO L225 Difference]: With dead ends: 4372 [2021-05-21 20:31:05,367 INFO L226 Difference]: Without dead ends: 4339 [2021-05-21 20:31:05,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:31:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-05-21 20:31:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-05-21 20:31:05,401 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) [2021-05-21 20:31:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-05-21 20:31:05,407 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-05-21 20:31:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:05,407 INFO L482 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-05-21 20:31:05,407 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) [2021-05-21 20:31:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-05-21 20:31:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:05,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:05,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:05,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:05,625 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-05-21 20:31:05,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:05,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033130542] [2021-05-21 20:31:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:05,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:05,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033130542] [2021-05-21 20:31:05,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033130542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:05,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186602855] [2021-05-21 20:31:05,659 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 [2021-05-21 20:31:05,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:05,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186602855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:05,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:05,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:31:05,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718552668] [2021-05-21 20:31:05,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:31:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:31:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:31:05,741 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) [2021-05-21 20:31:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:05,839 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-05-21 20:31:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:05,840 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 [2021-05-21 20:31:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:05,843 INFO L225 Difference]: With dead ends: 4649 [2021-05-21 20:31:05,843 INFO L226 Difference]: Without dead ends: 4649 [2021-05-21 20:31:05,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:31:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-05-21 20:31:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-05-21 20:31:05,879 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) [2021-05-21 20:31:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-05-21 20:31:05,885 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-05-21 20:31:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:05,885 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-05-21 20:31:05,885 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) [2021-05-21 20:31:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-05-21 20:31:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:05,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:05,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:06,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:31:06,098 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-05-21 20:31:06,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:06,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598149481] [2021-05-21 20:31:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:06,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:06,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598149481] [2021-05-21 20:31:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598149481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72585350] [2021-05-21 20:31:06,128 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 [2021-05-21 20:31:06,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:31:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:06,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72585350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:06,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-21 20:31:06,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792275018] [2021-05-21 20:31:06,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:31:06,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:31:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:31:06,202 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) [2021-05-21 20:31:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:06,272 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-05-21 20:31:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:06,272 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 [2021-05-21 20:31:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:06,275 INFO L225 Difference]: With dead ends: 3822 [2021-05-21 20:31:06,275 INFO L226 Difference]: Without dead ends: 3822 [2021-05-21 20:31:06,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:31:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-05-21 20:31:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-05-21 20:31:06,303 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) [2021-05-21 20:31:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-05-21 20:31:06,307 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-05-21 20:31:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:06,307 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-05-21 20:31:06,307 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) [2021-05-21 20:31:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-05-21 20:31:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:06,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:06,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:06,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:31:06,522 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-05-21 20:31:06,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:06,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055254987] [2021-05-21 20:31:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:06,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:06,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055254987] [2021-05-21 20:31:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055254987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361900900] [2021-05-21 20:31:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:31:06,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:06,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:31:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361900900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:06,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:31:06,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75466010] [2021-05-21 20:31:06,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:06,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:06,599 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) [2021-05-21 20:31:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:06,656 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-05-21 20:31:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:31:06,656 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 [2021-05-21 20:31:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:06,659 INFO L225 Difference]: With dead ends: 3755 [2021-05-21 20:31:06,659 INFO L226 Difference]: Without dead ends: 3743 [2021-05-21 20:31:06,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:31:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-05-21 20:31:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-05-21 20:31:06,687 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) [2021-05-21 20:31:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-05-21 20:31:06,691 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-05-21 20:31:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:06,691 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-05-21 20:31:06,691 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) [2021-05-21 20:31:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-05-21 20:31:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:06,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:06,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:06,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:06,894 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-05-21 20:31:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:06,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086303991] [2021-05-21 20:31:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:06,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:06,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086303991] [2021-05-21 20:31:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086303991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407476733] [2021-05-21 20:31:06,910 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 [2021-05-21 20:31:06,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:31:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:31:06,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:06,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407476733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:06,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:06,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:31:06,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647266369] [2021-05-21 20:31:06,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:31:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:31:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:31:06,973 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) [2021-05-21 20:31:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:07,016 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-05-21 20:31:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:31:07,016 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 [2021-05-21 20:31:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:07,019 INFO L225 Difference]: With dead ends: 3731 [2021-05-21 20:31:07,019 INFO L226 Difference]: Without dead ends: 3731 [2021-05-21 20:31:07,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:31:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-05-21 20:31:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-05-21 20:31:07,045 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) [2021-05-21 20:31:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-05-21 20:31:07,049 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-05-21 20:31:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:07,049 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-05-21 20:31:07,049 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) [2021-05-21 20:31:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-05-21 20:31:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:07,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:07,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:07,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:07,267 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-05-21 20:31:07,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:07,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064857121] [2021-05-21 20:31:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:07,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064857121] [2021-05-21 20:31:07,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064857121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706541258] [2021-05-21 20:31:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:07,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:31:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:31:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706541258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:07,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:07,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:31:07,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133997109] [2021-05-21 20:31:07,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:31:07,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:31:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:31:07,354 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) [2021-05-21 20:31:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:07,400 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-05-21 20:31:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:31:07,401 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 [2021-05-21 20:31:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:07,404 INFO L225 Difference]: With dead ends: 3810 [2021-05-21 20:31:07,404 INFO L226 Difference]: Without dead ends: 3808 [2021-05-21 20:31:07,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:31:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-05-21 20:31:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-05-21 20:31:07,436 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) [2021-05-21 20:31:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-05-21 20:31:07,440 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-05-21 20:31:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:07,440 INFO L482 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-05-21 20:31:07,440 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) [2021-05-21 20:31:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-05-21 20:31:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:07,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:07,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:07,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 20:31:07,643 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-05-21 20:31:07,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:07,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115576193] [2021-05-21 20:31:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:07,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:07,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115576193] [2021-05-21 20:31:07,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115576193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956865612] [2021-05-21 20:31:07,662 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 [2021-05-21 20:31:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:31:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956865612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:07,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:07,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:31:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113795674] [2021-05-21 20:31:07,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:31:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:31:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:31:07,714 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) [2021-05-21 20:31:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:07,759 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-05-21 20:31:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:31:07,759 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 [2021-05-21 20:31:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:07,762 INFO L225 Difference]: With dead ends: 3976 [2021-05-21 20:31:07,762 INFO L226 Difference]: Without dead ends: 3973 [2021-05-21 20:31:07,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:31:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-05-21 20:31:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-05-21 20:31:07,793 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) [2021-05-21 20:31:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-05-21 20:31:07,799 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-05-21 20:31:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:07,799 INFO L482 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-05-21 20:31:07,799 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) [2021-05-21 20:31:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-05-21 20:31:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:31:07,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:07,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:08,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:08,017 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:08,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-05-21 20:31:08,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:08,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950418995] [2021-05-21 20:31:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950418995] [2021-05-21 20:31:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950418995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847378961] [2021-05-21 20:31:08,034 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 [2021-05-21 20:31:08,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:08,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:31:08,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:08,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847378961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:08,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:08,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:31:08,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580715083] [2021-05-21 20:31:08,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:08,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:08,098 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) [2021-05-21 20:31:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:08,154 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-05-21 20:31:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:31:08,154 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 [2021-05-21 20:31:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:08,157 INFO L225 Difference]: With dead ends: 3970 [2021-05-21 20:31:08,157 INFO L226 Difference]: Without dead ends: 3967 [2021-05-21 20:31:08,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:31:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-05-21 20:31:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-05-21 20:31:08,199 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) [2021-05-21 20:31:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-05-21 20:31:08,203 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-05-21 20:31:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:08,204 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-05-21 20:31:08,204 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) [2021-05-21 20:31:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-05-21 20:31:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:31:08,206 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:08,206 INFO L521 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] [2021-05-21 20:31:08,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 20:31:08,407 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-05-21 20:31:08,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:08,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814681201] [2021-05-21 20:31:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:08,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814681201] [2021-05-21 20:31:08,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814681201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:08,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750039536] [2021-05-21 20:31:08,553 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 [2021-05-21 20:31:08,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:31:08,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:08,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 20:31:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750039536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:08,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:08,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 20:31:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420143740] [2021-05-21 20:31:08,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:08,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:08,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:08,812 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) [2021-05-21 20:31:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:09,812 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-05-21 20:31:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:31:09,813 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 [2021-05-21 20:31:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:09,816 INFO L225 Difference]: With dead ends: 4929 [2021-05-21 20:31:09,816 INFO L226 Difference]: Without dead ends: 4855 [2021-05-21 20:31:09,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 828.9ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:31:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-05-21 20:31:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-05-21 20:31:09,849 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) [2021-05-21 20:31:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-05-21 20:31:09,853 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-05-21 20:31:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:09,854 INFO L482 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-05-21 20:31:09,854 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) [2021-05-21 20:31:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-05-21 20:31:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:31:09,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:09,857 INFO L521 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] [2021-05-21 20:31:10,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 20:31:10,072 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-05-21 20:31:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:10,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90635953] [2021-05-21 20:31:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:10,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:10,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90635953] [2021-05-21 20:31:10,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90635953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:10,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727443622] [2021-05-21 20:31:10,203 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 [2021-05-21 20:31:10,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:10,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:10,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 20:31:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:10,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727443622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:10,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:10,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 20:31:10,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621394196] [2021-05-21 20:31:10,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:10,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:10,437 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) [2021-05-21 20:31:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:11,280 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-05-21 20:31:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:31:11,281 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 [2021-05-21 20:31:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:11,285 INFO L225 Difference]: With dead ends: 5234 [2021-05-21 20:31:11,285 INFO L226 Difference]: Without dead ends: 5194 [2021-05-21 20:31:11,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 692.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:31:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-05-21 20:31:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-05-21 20:31:11,320 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) [2021-05-21 20:31:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-05-21 20:31:11,325 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-05-21 20:31:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-05-21 20:31:11,325 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) [2021-05-21 20:31:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-05-21 20:31:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:31:11,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:11,328 INFO L521 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] [2021-05-21 20:31:11,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 20:31:11,529 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-05-21 20:31:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353666232] [2021-05-21 20:31:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:11,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353666232] [2021-05-21 20:31:11,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353666232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551349186] [2021-05-21 20:31:11,627 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 [2021-05-21 20:31:11,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:31:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 20:31:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:11,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551349186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:11,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:11,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 20:31:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832917048] [2021-05-21 20:31:11,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:11,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:11,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:11,862 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) [2021-05-21 20:31:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:12,853 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-05-21 20:31:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:31:12,853 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 [2021-05-21 20:31:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:12,857 INFO L225 Difference]: With dead ends: 5435 [2021-05-21 20:31:12,857 INFO L226 Difference]: Without dead ends: 5402 [2021-05-21 20:31:12,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:31:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-05-21 20:31:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-05-21 20:31:12,895 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) [2021-05-21 20:31:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-05-21 20:31:12,900 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-05-21 20:31:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:12,900 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-05-21 20:31:12,900 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) [2021-05-21 20:31:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-05-21 20:31:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:31:12,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:12,903 INFO L521 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] [2021-05-21 20:31:13,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:31:13,103 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-05-21 20:31:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:13,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080018164] [2021-05-21 20:31:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:13,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080018164] [2021-05-21 20:31:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080018164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161369847] [2021-05-21 20:31:13,226 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 [2021-05-21 20:31:13,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:31:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 20:31:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:13,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161369847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:13,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:13,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 20:31:13,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786040107] [2021-05-21 20:31:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:13,475 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) [2021-05-21 20:31:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:14,295 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-05-21 20:31:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:31:14,296 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 [2021-05-21 20:31:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:14,300 INFO L225 Difference]: With dead ends: 5530 [2021-05-21 20:31:14,300 INFO L226 Difference]: Without dead ends: 5486 [2021-05-21 20:31:14,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:31:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-05-21 20:31:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-05-21 20:31:14,340 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) [2021-05-21 20:31:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-05-21 20:31:14,346 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-05-21 20:31:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-05-21 20:31:14,346 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) [2021-05-21 20:31:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-05-21 20:31:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:14,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:14,349 INFO L521 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] [2021-05-21 20:31:14,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 20:31:14,550 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:14,550 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-05-21 20:31:14,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:14,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058297853] [2021-05-21 20:31:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:14,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058297853] [2021-05-21 20:31:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058297853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95513350] [2021-05-21 20:31:14,641 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 [2021-05-21 20:31:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95513350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:14,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:14,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-21 20:31:14,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898255370] [2021-05-21 20:31:14,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:31:14,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:31:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:14,805 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) [2021-05-21 20:31:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:15,103 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-05-21 20:31:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:31:15,103 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 [2021-05-21 20:31:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:15,108 INFO L225 Difference]: With dead ends: 5662 [2021-05-21 20:31:15,108 INFO L226 Difference]: Without dead ends: 5648 [2021-05-21 20:31:15,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-05-21 20:31:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-05-21 20:31:15,162 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) [2021-05-21 20:31:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-05-21 20:31:15,169 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-05-21 20:31:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:15,169 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-05-21 20:31:15,169 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) [2021-05-21 20:31:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-05-21 20:31:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:15,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:15,172 INFO L521 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] [2021-05-21 20:31:15,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 20:31:15,372 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-05-21 20:31:15,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:15,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240346663] [2021-05-21 20:31:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:15,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240346663] [2021-05-21 20:31:15,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240346663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122301657] [2021-05-21 20:31:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:31:15,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:15,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122301657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:15,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:15,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-21 20:31:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831814157] [2021-05-21 20:31:15,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:31:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:31:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:15,636 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) [2021-05-21 20:31:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:15,982 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-05-21 20:31:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:31:15,983 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 [2021-05-21 20:31:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:15,987 INFO L225 Difference]: With dead ends: 5807 [2021-05-21 20:31:15,987 INFO L226 Difference]: Without dead ends: 5793 [2021-05-21 20:31:15,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-05-21 20:31:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-05-21 20:31:16,032 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) [2021-05-21 20:31:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-05-21 20:31:16,039 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-05-21 20:31:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:16,039 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-05-21 20:31:16,039 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) [2021-05-21 20:31:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-05-21 20:31:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:16,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:16,042 INFO L521 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] [2021-05-21 20:31:16,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:31:16,245 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-05-21 20:31:16,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:16,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541758994] [2021-05-21 20:31:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:16,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541758994] [2021-05-21 20:31:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541758994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076284862] [2021-05-21 20:31:16,334 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 [2021-05-21 20:31:16,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:16,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:16,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:16,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076284862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:16,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:16,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:16,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519902289] [2021-05-21 20:31:16,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:16,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:16,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:16,536 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) [2021-05-21 20:31:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:17,028 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-05-21 20:31:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:17,028 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 [2021-05-21 20:31:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:17,033 INFO L225 Difference]: With dead ends: 6674 [2021-05-21 20:31:17,033 INFO L226 Difference]: Without dead ends: 6644 [2021-05-21 20:31:17,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-05-21 20:31:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-05-21 20:31:17,081 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) [2021-05-21 20:31:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-05-21 20:31:17,088 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-05-21 20:31:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:17,088 INFO L482 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-05-21 20:31:17,088 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) [2021-05-21 20:31:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-05-21 20:31:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:17,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:17,091 INFO L521 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] [2021-05-21 20:31:17,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:17,293 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-05-21 20:31:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:17,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758961887] [2021-05-21 20:31:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:17,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758961887] [2021-05-21 20:31:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758961887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:17,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47573917] [2021-05-21 20:31:17,387 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 [2021-05-21 20:31:17,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:17,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47573917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351211391] [2021-05-21 20:31:17,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:17,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:17,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:17,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:17,562 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) [2021-05-21 20:31:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:17,878 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-05-21 20:31:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:31:17,879 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 [2021-05-21 20:31:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:17,885 INFO L225 Difference]: With dead ends: 7466 [2021-05-21 20:31:17,885 INFO L226 Difference]: Without dead ends: 7426 [2021-05-21 20:31:17,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-05-21 20:31:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-05-21 20:31:17,963 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) [2021-05-21 20:31:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-05-21 20:31:17,974 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-05-21 20:31:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:17,974 INFO L482 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-05-21 20:31:17,974 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) [2021-05-21 20:31:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-05-21 20:31:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:17,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:17,978 INFO L521 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] [2021-05-21 20:31:18,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:18,179 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-05-21 20:31:18,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:18,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37967615] [2021-05-21 20:31:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:18,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:18,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37967615] [2021-05-21 20:31:18,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37967615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:18,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604423855] [2021-05-21 20:31:18,271 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 [2021-05-21 20:31:18,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:31:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604423855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:18,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:18,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-21 20:31:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663500561] [2021-05-21 20:31:18,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:18,477 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) [2021-05-21 20:31:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:18,793 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-05-21 20:31:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:31:18,794 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 [2021-05-21 20:31:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:18,800 INFO L225 Difference]: With dead ends: 7186 [2021-05-21 20:31:18,800 INFO L226 Difference]: Without dead ends: 7172 [2021-05-21 20:31:18,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:31:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-05-21 20:31:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-05-21 20:31:18,856 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) [2021-05-21 20:31:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-05-21 20:31:18,865 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-05-21 20:31:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:18,865 INFO L482 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-05-21 20:31:18,865 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) [2021-05-21 20:31:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-05-21 20:31:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:18,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:18,869 INFO L521 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] [2021-05-21 20:31:19,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:19,070 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-05-21 20:31:19,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:19,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217467126] [2021-05-21 20:31:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:19,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217467126] [2021-05-21 20:31:19,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217467126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768988085] [2021-05-21 20:31:19,159 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 [2021-05-21 20:31:19,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:31:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:19,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768988085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:19,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:19,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128953191] [2021-05-21 20:31:19,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:19,348 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) [2021-05-21 20:31:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:19,712 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-05-21 20:31:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:31:19,712 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 [2021-05-21 20:31:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:19,720 INFO L225 Difference]: With dead ends: 8381 [2021-05-21 20:31:19,720 INFO L226 Difference]: Without dead ends: 8341 [2021-05-21 20:31:19,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:31:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-05-21 20:31:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-05-21 20:31:19,785 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) [2021-05-21 20:31:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-05-21 20:31:19,794 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-05-21 20:31:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:19,794 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-05-21 20:31:19,794 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) [2021-05-21 20:31:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-05-21 20:31:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:19,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:19,799 INFO L521 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] [2021-05-21 20:31:20,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 20:31:20,000 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-05-21 20:31:20,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:20,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302646093] [2021-05-21 20:31:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:20,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:20,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302646093] [2021-05-21 20:31:20,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302646093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:20,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954427903] [2021-05-21 20:31:20,084 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) [2021-05-21 20:31:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:20,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954427903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:20,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:20,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-21 20:31:20,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961013571] [2021-05-21 20:31:20,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:31:20,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:31:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:20,241 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) [2021-05-21 20:31:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:20,724 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-05-21 20:31:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:20,725 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 [2021-05-21 20:31:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:20,734 INFO L225 Difference]: With dead ends: 9510 [2021-05-21 20:31:20,734 INFO L226 Difference]: Without dead ends: 9476 [2021-05-21 20:31:20,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:31:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-05-21 20:31:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-05-21 20:31:20,807 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) [2021-05-21 20:31:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-05-21 20:31:20,818 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-05-21 20:31:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:20,818 INFO L482 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-05-21 20:31:20,818 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) [2021-05-21 20:31:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-05-21 20:31:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:20,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:20,823 INFO L521 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] [2021-05-21 20:31:21,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:21,024 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-05-21 20:31:21,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:21,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071728649] [2021-05-21 20:31:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:21,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071728649] [2021-05-21 20:31:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071728649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629831699] [2021-05-21 20:31:21,107 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 [2021-05-21 20:31:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:21,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629831699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:21,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:21,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954465685] [2021-05-21 20:31:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:21,280 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) [2021-05-21 20:31:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:21,653 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-05-21 20:31:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:31:21,653 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 [2021-05-21 20:31:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:21,661 INFO L225 Difference]: With dead ends: 9488 [2021-05-21 20:31:21,661 INFO L226 Difference]: Without dead ends: 9449 [2021-05-21 20:31:21,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:31:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-05-21 20:31:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-05-21 20:31:21,735 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) [2021-05-21 20:31:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-05-21 20:31:21,746 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-05-21 20:31:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:21,746 INFO L482 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-05-21 20:31:21,746 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) [2021-05-21 20:31:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-05-21 20:31:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:21,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:21,752 INFO L521 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] [2021-05-21 20:31:21,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:21,961 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-05-21 20:31:21,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:21,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345136856] [2021-05-21 20:31:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:22,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345136856] [2021-05-21 20:31:22,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345136856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770999756] [2021-05-21 20:31:22,095 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 [2021-05-21 20:31:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:22,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770999756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:22,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:22,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:22,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554415375] [2021-05-21 20:31:22,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:22,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:22,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:22,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:22,261 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) [2021-05-21 20:31:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:22,705 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-05-21 20:31:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:31:22,705 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 [2021-05-21 20:31:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:22,715 INFO L225 Difference]: With dead ends: 11530 [2021-05-21 20:31:22,715 INFO L226 Difference]: Without dead ends: 11490 [2021-05-21 20:31:22,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:31:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-05-21 20:31:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-05-21 20:31:22,801 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) [2021-05-21 20:31:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-05-21 20:31:22,814 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-05-21 20:31:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:22,814 INFO L482 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-05-21 20:31:22,814 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) [2021-05-21 20:31:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-05-21 20:31:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:22,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:22,826 INFO L521 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] [2021-05-21 20:31:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 20:31:23,041 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-05-21 20:31:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206814669] [2021-05-21 20:31:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:23,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:23,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206814669] [2021-05-21 20:31:23,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206814669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:23,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423004144] [2021-05-21 20:31:23,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:31:23,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:23,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423004144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-21 20:31:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567942099] [2021-05-21 20:31:23,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:31:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:31:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:23,274 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) [2021-05-21 20:31:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:23,527 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-05-21 20:31:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:31:23,528 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 [2021-05-21 20:31:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:23,537 INFO L225 Difference]: With dead ends: 10586 [2021-05-21 20:31:23,537 INFO L226 Difference]: Without dead ends: 10559 [2021-05-21 20:31:23,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-05-21 20:31:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-05-21 20:31:23,624 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) [2021-05-21 20:31:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-05-21 20:31:23,638 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-05-21 20:31:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:23,638 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-05-21 20:31:23,638 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) [2021-05-21 20:31:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-05-21 20:31:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:23,644 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:23,644 INFO L521 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] [2021-05-21 20:31:23,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 20:31:23,844 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-05-21 20:31:23,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:23,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845594235] [2021-05-21 20:31:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:23,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845594235] [2021-05-21 20:31:23,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845594235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:23,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055520278] [2021-05-21 20:31:23,924 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 [2021-05-21 20:31:23,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:31:23,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:24,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055520278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:24,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:24,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-21 20:31:24,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972671850] [2021-05-21 20:31:24,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:31:24,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:31:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:31:24,094 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) [2021-05-21 20:31:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:24,380 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-05-21 20:31:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:31:24,381 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 [2021-05-21 20:31:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:24,390 INFO L225 Difference]: With dead ends: 11077 [2021-05-21 20:31:24,390 INFO L226 Difference]: Without dead ends: 11043 [2021-05-21 20:31:24,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-05-21 20:31:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-05-21 20:31:24,514 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) [2021-05-21 20:31:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-05-21 20:31:24,528 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-05-21 20:31:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:24,528 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-05-21 20:31:24,528 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) [2021-05-21 20:31:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-05-21 20:31:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 20:31:24,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:24,534 INFO L521 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] [2021-05-21 20:31:24,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 20:31:24,735 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-05-21 20:31:24,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:24,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278302203] [2021-05-21 20:31:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:24,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:24,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278302203] [2021-05-21 20:31:24,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278302203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:24,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311293078] [2021-05-21 20:31:24,817 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 [2021-05-21 20:31:24,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:31:24,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:31:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:25,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311293078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:25,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:25,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-21 20:31:25,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653316629] [2021-05-21 20:31:25,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 20:31:25,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 20:31:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:25,001 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) [2021-05-21 20:31:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:25,309 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-05-21 20:31:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:31:25,310 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 [2021-05-21 20:31:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:25,320 INFO L225 Difference]: With dead ends: 11359 [2021-05-21 20:31:25,320 INFO L226 Difference]: Without dead ends: 11319 [2021-05-21 20:31:25,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:31:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-05-21 20:31:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-05-21 20:31:25,412 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) [2021-05-21 20:31:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-05-21 20:31:25,426 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-05-21 20:31:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:25,426 INFO L482 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-05-21 20:31:25,426 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) [2021-05-21 20:31:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-05-21 20:31:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:31:25,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:25,433 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:25,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:25,633 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-05-21 20:31:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45835644] [2021-05-21 20:31:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:31:25,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45835644] [2021-05-21 20:31:25,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45835644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331556356] [2021-05-21 20:31:25,702 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 [2021-05-21 20:31:25,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:31:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 20:31:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 20:31:25,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331556356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:25,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:25,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:31:25,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974537342] [2021-05-21 20:31:25,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:31:25,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:25,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:31:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:31:25,824 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) [2021-05-21 20:31:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:26,094 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-05-21 20:31:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:31:26,094 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 [2021-05-21 20:31:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:26,104 INFO L225 Difference]: With dead ends: 10579 [2021-05-21 20:31:26,104 INFO L226 Difference]: Without dead ends: 10480 [2021-05-21 20:31:26,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:31:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-05-21 20:31:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-05-21 20:31:26,214 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) [2021-05-21 20:31:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-05-21 20:31:26,228 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-05-21 20:31:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:26,229 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-05-21 20:31:26,229 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) [2021-05-21 20:31:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-05-21 20:31:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:26,236 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:26,236 INFO L521 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] [2021-05-21 20:31:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:26,436 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-05-21 20:31:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799575198] [2021-05-21 20:31:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:26,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799575198] [2021-05-21 20:31:26,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799575198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084792846] [2021-05-21 20:31:26,485 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) [2021-05-21 20:31:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:26,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084792846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:26,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:26,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:31:26,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465414900] [2021-05-21 20:31:26,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:31:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:31:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:31:26,567 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) [2021-05-21 20:31:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:26,705 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-05-21 20:31:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:31:26,705 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 [2021-05-21 20:31:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:26,719 INFO L225 Difference]: With dead ends: 13175 [2021-05-21 20:31:26,719 INFO L226 Difference]: Without dead ends: 13175 [2021-05-21 20:31:26,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:31:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-05-21 20:31:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-05-21 20:31:26,833 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) [2021-05-21 20:31:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-05-21 20:31:26,850 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-05-21 20:31:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:26,850 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-05-21 20:31:26,850 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) [2021-05-21 20:31:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-05-21 20:31:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:26,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:26,858 INFO L521 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] [2021-05-21 20:31:27,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:27,073 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-05-21 20:31:27,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:27,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966548177] [2021-05-21 20:31:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:27,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:27,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966548177] [2021-05-21 20:31:27,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966548177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:27,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883711188] [2021-05-21 20:31:27,103 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:27,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:31:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:27,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883711188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:27,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:27,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 20:31:27,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574448820] [2021-05-21 20:31:27,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:31:27,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:31:27,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:31:27,187 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) [2021-05-21 20:31:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:27,311 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-05-21 20:31:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:31:27,311 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 [2021-05-21 20:31:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:27,319 INFO L225 Difference]: With dead ends: 9582 [2021-05-21 20:31:27,319 INFO L226 Difference]: Without dead ends: 9546 [2021-05-21 20:31:27,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:31:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-05-21 20:31:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-05-21 20:31:27,410 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) [2021-05-21 20:31:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-05-21 20:31:27,421 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-05-21 20:31:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:27,421 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-05-21 20:31:27,422 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) [2021-05-21 20:31:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-05-21 20:31:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:27,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:27,427 INFO L521 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] [2021-05-21 20:31:27,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:27,627 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:27,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-05-21 20:31:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:27,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196441805] [2021-05-21 20:31:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:27,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:27,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196441805] [2021-05-21 20:31:27,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196441805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:27,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062962634] [2021-05-21 20:31:27,651 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 [2021-05-21 20:31:27,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:31:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:27,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062962634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:27,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:27,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:31:27,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149984951] [2021-05-21 20:31:27,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:27,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:27,717 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) [2021-05-21 20:31:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:27,786 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-05-21 20:31:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:31:27,787 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 [2021-05-21 20:31:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:27,795 INFO L225 Difference]: With dead ends: 9119 [2021-05-21 20:31:27,795 INFO L226 Difference]: Without dead ends: 9116 [2021-05-21 20:31:27,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:31:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-05-21 20:31:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-05-21 20:31:27,879 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) [2021-05-21 20:31:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-05-21 20:31:27,892 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-05-21 20:31:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:27,892 INFO L482 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-05-21 20:31:27,892 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) [2021-05-21 20:31:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-05-21 20:31:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:27,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:27,898 INFO L521 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] [2021-05-21 20:31:28,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 20:31:28,113 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-05-21 20:31:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:28,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747794034] [2021-05-21 20:31:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:28,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:28,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747794034] [2021-05-21 20:31:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747794034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121800924] [2021-05-21 20:31:28,133 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 [2021-05-21 20:31:28,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:31:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121800924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:28,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:28,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:31:28,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377174193] [2021-05-21 20:31:28,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:28,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:28,195 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) [2021-05-21 20:31:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:28,267 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-05-21 20:31:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:28,267 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 [2021-05-21 20:31:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:28,279 INFO L225 Difference]: With dead ends: 11397 [2021-05-21 20:31:28,279 INFO L226 Difference]: Without dead ends: 11397 [2021-05-21 20:31:28,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:31:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-05-21 20:31:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-05-21 20:31:28,373 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) [2021-05-21 20:31:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-05-21 20:31:28,387 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-05-21 20:31:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:28,387 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-05-21 20:31:28,387 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) [2021-05-21 20:31:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-05-21 20:31:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:28,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:28,393 INFO L521 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] [2021-05-21 20:31:28,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:28,607 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:28,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-05-21 20:31:28,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:28,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898116795] [2021-05-21 20:31:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:28,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898116795] [2021-05-21 20:31:28,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898116795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623791309] [2021-05-21 20:31:28,626 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 [2021-05-21 20:31:28,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:31:28,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:31:28,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623791309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:28,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:28,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:31:28,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617301418] [2021-05-21 20:31:28,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:28,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:28,689 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) [2021-05-21 20:31:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:28,761 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-05-21 20:31:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:31:28,761 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 [2021-05-21 20:31:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:28,771 INFO L225 Difference]: With dead ends: 11244 [2021-05-21 20:31:28,771 INFO L226 Difference]: Without dead ends: 11238 [2021-05-21 20:31:28,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:31:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-05-21 20:31:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-05-21 20:31:28,876 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) [2021-05-21 20:31:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-05-21 20:31:28,888 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-05-21 20:31:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:28,888 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-05-21 20:31:28,888 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) [2021-05-21 20:31:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-05-21 20:31:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:28,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:28,894 INFO L521 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] [2021-05-21 20:31:29,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 20:31:29,094 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-05-21 20:31:29,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:29,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272955904] [2021-05-21 20:31:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:29,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272955904] [2021-05-21 20:31:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272955904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854747058] [2021-05-21 20:31:29,122 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 [2021-05-21 20:31:29,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:31:29,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:29,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:29,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854747058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:29,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:29,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:31:29,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315686059] [2021-05-21 20:31:29,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:31:29,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:29,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:31:29,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:31:29,184 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) [2021-05-21 20:31:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:29,262 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-05-21 20:31:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:29,263 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 [2021-05-21 20:31:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:29,271 INFO L225 Difference]: With dead ends: 9906 [2021-05-21 20:31:29,271 INFO L226 Difference]: Without dead ends: 9894 [2021-05-21 20:31:29,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:31:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-05-21 20:31:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-05-21 20:31:29,347 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) [2021-05-21 20:31:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-05-21 20:31:29,359 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-05-21 20:31:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:29,359 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-05-21 20:31:29,359 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) [2021-05-21 20:31:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-05-21 20:31:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:29,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:29,364 INFO L521 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] [2021-05-21 20:31:29,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 20:31:29,565 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-05-21 20:31:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:29,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805054804] [2021-05-21 20:31:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:29,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:29,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805054804] [2021-05-21 20:31:29,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805054804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:29,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90348789] [2021-05-21 20:31:29,587 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) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:31:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90348789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:29,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:29,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:31:29,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673612865] [2021-05-21 20:31:29,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:31:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:31:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:31:29,649 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) [2021-05-21 20:31:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:29,722 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-05-21 20:31:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:29,723 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 [2021-05-21 20:31:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:29,731 INFO L225 Difference]: With dead ends: 10139 [2021-05-21 20:31:29,731 INFO L226 Difference]: Without dead ends: 10139 [2021-05-21 20:31:29,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:31:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-05-21 20:31:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-05-21 20:31:29,807 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) [2021-05-21 20:31:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-05-21 20:31:29,818 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-05-21 20:31:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:29,818 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-05-21 20:31:29,818 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) [2021-05-21 20:31:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-05-21 20:31:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:29,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:29,824 INFO L521 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] [2021-05-21 20:31:30,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:30,024 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-05-21 20:31:30,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:30,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810365602] [2021-05-21 20:31:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:30,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:30,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810365602] [2021-05-21 20:31:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810365602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:30,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693163742] [2021-05-21 20:31:30,047 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) [2021-05-21 20:31:30,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:30,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693163742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:30,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:30,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:31:30,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458241675] [2021-05-21 20:31:30,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:30,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:30,112 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) [2021-05-21 20:31:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:30,185 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-05-21 20:31:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:30,185 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 [2021-05-21 20:31:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:30,195 INFO L225 Difference]: With dead ends: 11101 [2021-05-21 20:31:30,195 INFO L226 Difference]: Without dead ends: 11101 [2021-05-21 20:31:30,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:31:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-05-21 20:31:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-05-21 20:31:30,302 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) [2021-05-21 20:31:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-05-21 20:31:30,315 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-05-21 20:31:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:30,315 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-05-21 20:31:30,316 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) [2021-05-21 20:31:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-05-21 20:31:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:30,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:30,321 INFO L521 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] [2021-05-21 20:31:30,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 20:31:30,522 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-05-21 20:31:30,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:30,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025873751] [2021-05-21 20:31:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:30,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025873751] [2021-05-21 20:31:30,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025873751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026966432] [2021-05-21 20:31:30,547 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:30,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:30,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026966432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:30,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:30,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:31:30,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484650775] [2021-05-21 20:31:30,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:31:30,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:31:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:31:30,603 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) [2021-05-21 20:31:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:30,669 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-05-21 20:31:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:31:30,669 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 [2021-05-21 20:31:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:30,679 INFO L225 Difference]: With dead ends: 11074 [2021-05-21 20:31:30,679 INFO L226 Difference]: Without dead ends: 11071 [2021-05-21 20:31:30,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:31:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-05-21 20:31:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-05-21 20:31:30,767 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) [2021-05-21 20:31:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-05-21 20:31:30,781 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-05-21 20:31:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:30,781 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-05-21 20:31:30,781 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) [2021-05-21 20:31:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-05-21 20:31:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:30,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:30,787 INFO L521 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] [2021-05-21 20:31:30,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:30,987 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-05-21 20:31:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:30,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408261970] [2021-05-21 20:31:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:31,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408261970] [2021-05-21 20:31:31,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408261970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:31,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825756282] [2021-05-21 20:31:31,006 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 [2021-05-21 20:31:31,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:31:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825756282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:31,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:31,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 20:31:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653287697] [2021-05-21 20:31:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:31:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:31:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:31:31,068 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) [2021-05-21 20:31:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:31,143 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-05-21 20:31:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:31:31,143 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 [2021-05-21 20:31:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:31,152 INFO L225 Difference]: With dead ends: 11098 [2021-05-21 20:31:31,152 INFO L226 Difference]: Without dead ends: 11086 [2021-05-21 20:31:31,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:31:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-05-21 20:31:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-05-21 20:31:31,237 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) [2021-05-21 20:31:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-05-21 20:31:31,250 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-05-21 20:31:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:31,251 INFO L482 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-05-21 20:31:31,251 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) [2021-05-21 20:31:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-05-21 20:31:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 20:31:31,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:31,256 INFO L521 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] [2021-05-21 20:31:31,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-21 20:31:31,461 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-05-21 20:31:31,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:31,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595638025] [2021-05-21 20:31:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:31,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:31,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595638025] [2021-05-21 20:31:31,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595638025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:31,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183127726] [2021-05-21 20:31:31,498 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) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:31,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:31:31,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:31:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:31,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183127726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:31,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:31,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:31:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904300668] [2021-05-21 20:31:31,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:31:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:31:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:31:31,560 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) [2021-05-21 20:31:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:31,673 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-05-21 20:31:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:31:31,674 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 [2021-05-21 20:31:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:31,682 INFO L225 Difference]: With dead ends: 11062 [2021-05-21 20:31:31,682 INFO L226 Difference]: Without dead ends: 11039 [2021-05-21 20:31:31,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:31:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-05-21 20:31:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-05-21 20:31:31,787 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) [2021-05-21 20:31:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-05-21 20:31:31,802 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-05-21 20:31:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:31,802 INFO L482 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-05-21 20:31:31,802 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) [2021-05-21 20:31:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-05-21 20:31:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 20:31:31,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:31,809 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:31:32,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:32,009 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-05-21 20:31:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:32,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42044645] [2021-05-21 20:31:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:32,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42044645] [2021-05-21 20:31:32,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42044645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114974454] [2021-05-21 20:31:32,054 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 [2021-05-21 20:31:32,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:31:32,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:31:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:32,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114974454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:32,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:32,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 20:31:32,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446277339] [2021-05-21 20:31:32,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:31:32,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:32,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:31:32,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:31:32,125 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) [2021-05-21 20:31:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:32,251 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-05-21 20:31:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:31:32,252 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 [2021-05-21 20:31:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:32,261 INFO L225 Difference]: With dead ends: 11977 [2021-05-21 20:31:32,261 INFO L226 Difference]: Without dead ends: 11977 [2021-05-21 20:31:32,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:31:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-05-21 20:31:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-05-21 20:31:32,349 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) [2021-05-21 20:31:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-05-21 20:31:32,363 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-05-21 20:31:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-05-21 20:31:32,363 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) [2021-05-21 20:31:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-05-21 20:31:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:32,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:32,369 INFO L521 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] [2021-05-21 20:31:32,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 20:31:32,570 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-05-21 20:31:32,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:32,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337642248] [2021-05-21 20:31:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:32,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:32,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337642248] [2021-05-21 20:31:32,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337642248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:32,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054813372] [2021-05-21 20:31:32,698 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 [2021-05-21 20:31:32,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:31:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:32,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054813372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:32,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:32,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779128897] [2021-05-21 20:31:32,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:32,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:32,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:32,936 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) [2021-05-21 20:31:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:33,468 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-05-21 20:31:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:33,469 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 [2021-05-21 20:31:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:33,480 INFO L225 Difference]: With dead ends: 11896 [2021-05-21 20:31:33,480 INFO L226 Difference]: Without dead ends: 11879 [2021-05-21 20:31:33,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:31:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-05-21 20:31:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-05-21 20:31:33,596 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) [2021-05-21 20:31:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-05-21 20:31:33,612 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-05-21 20:31:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:33,612 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-05-21 20:31:33,612 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) [2021-05-21 20:31:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-05-21 20:31:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:33,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:33,621 INFO L521 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] [2021-05-21 20:31:33,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:33,833 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-05-21 20:31:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:33,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599154643] [2021-05-21 20:31:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:33,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:33,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599154643] [2021-05-21 20:31:33,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599154643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:33,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680428233] [2021-05-21 20:31:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:31:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:33,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:33,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:34,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680428233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:34,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:34,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:34,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423672009] [2021-05-21 20:31:34,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:34,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:34,193 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) [2021-05-21 20:31:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:34,662 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-05-21 20:31:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:34,662 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 [2021-05-21 20:31:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:34,673 INFO L225 Difference]: With dead ends: 12194 [2021-05-21 20:31:34,673 INFO L226 Difference]: Without dead ends: 12177 [2021-05-21 20:31:34,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-05-21 20:31:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-05-21 20:31:34,768 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) [2021-05-21 20:31:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-05-21 20:31:34,783 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-05-21 20:31:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:34,783 INFO L482 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-05-21 20:31:34,783 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) [2021-05-21 20:31:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-05-21 20:31:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:34,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:34,791 INFO L521 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] [2021-05-21 20:31:34,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 20:31:34,995 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-05-21 20:31:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831763797] [2021-05-21 20:31:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:35,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831763797] [2021-05-21 20:31:35,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831763797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005473542] [2021-05-21 20:31:35,128 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 [2021-05-21 20:31:35,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:35,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005473542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:35,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:35,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:35,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776367129] [2021-05-21 20:31:35,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:35,365 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) [2021-05-21 20:31:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:35,990 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-05-21 20:31:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:35,990 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 [2021-05-21 20:31:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:36,002 INFO L225 Difference]: With dead ends: 12640 [2021-05-21 20:31:36,002 INFO L226 Difference]: Without dead ends: 12623 [2021-05-21 20:31:36,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:31:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-05-21 20:31:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-05-21 20:31:36,106 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) [2021-05-21 20:31:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-05-21 20:31:36,123 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-05-21 20:31:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:36,123 INFO L482 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-05-21 20:31:36,123 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) [2021-05-21 20:31:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-05-21 20:31:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:36,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:36,131 INFO L521 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] [2021-05-21 20:31:36,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:36,333 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-05-21 20:31:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:36,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274692439] [2021-05-21 20:31:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:36,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:36,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274692439] [2021-05-21 20:31:36,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274692439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:36,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627385943] [2021-05-21 20:31:36,464 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 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 [2021-05-21 20:31:36,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:31:36,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:36,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627385943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:36,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:36,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:31:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015807400] [2021-05-21 20:31:36,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:31:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:31:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:36,715 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) [2021-05-21 20:31:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:37,593 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-05-21 20:31:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:31:37,593 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 [2021-05-21 20:31:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:37,606 INFO L225 Difference]: With dead ends: 15043 [2021-05-21 20:31:37,607 INFO L226 Difference]: Without dead ends: 15009 [2021-05-21 20:31:37,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:31:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-05-21 20:31:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-05-21 20:31:37,722 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) [2021-05-21 20:31:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-05-21 20:31:37,740 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-05-21 20:31:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:37,740 INFO L482 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-05-21 20:31:37,740 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) [2021-05-21 20:31:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-05-21 20:31:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:37,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:37,748 INFO L521 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] [2021-05-21 20:31:37,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 20:31:37,948 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-05-21 20:31:37,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:37,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472056641] [2021-05-21 20:31:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:38,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:38,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472056641] [2021-05-21 20:31:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472056641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819351079] [2021-05-21 20:31:38,076 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 [2021-05-21 20:31:38,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:38,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:38,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819351079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:38,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:38,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:31:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747786952] [2021-05-21 20:31:38,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:38,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:38,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:38,331 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) [2021-05-21 20:31:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:38,807 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-05-21 20:31:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:31:38,808 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 [2021-05-21 20:31:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:38,821 INFO L225 Difference]: With dead ends: 14047 [2021-05-21 20:31:38,821 INFO L226 Difference]: Without dead ends: 14013 [2021-05-21 20:31:38,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-05-21 20:31:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-05-21 20:31:38,944 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) [2021-05-21 20:31:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-05-21 20:31:38,964 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-05-21 20:31:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:38,964 INFO L482 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-05-21 20:31:38,964 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) [2021-05-21 20:31:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-05-21 20:31:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:38,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:38,973 INFO L521 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] [2021-05-21 20:31:39,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 20:31:39,174 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-05-21 20:31:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:39,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594003071] [2021-05-21 20:31:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:39,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:39,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594003071] [2021-05-21 20:31:39,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594003071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:39,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591292555] [2021-05-21 20:31:39,328 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 [2021-05-21 20:31:39,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:31:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591292555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:39,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:39,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:31:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139400710] [2021-05-21 20:31:39,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:31:39,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:31:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:39,689 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) [2021-05-21 20:31:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:40,264 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-05-21 20:31:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:31:40,264 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 [2021-05-21 20:31:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:40,281 INFO L225 Difference]: With dead ends: 16913 [2021-05-21 20:31:40,281 INFO L226 Difference]: Without dead ends: 16870 [2021-05-21 20:31:40,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 556.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:31:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-05-21 20:31:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-05-21 20:31:40,429 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) [2021-05-21 20:31:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-05-21 20:31:40,452 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-05-21 20:31:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:40,452 INFO L482 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-05-21 20:31:40,452 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) [2021-05-21 20:31:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-05-21 20:31:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:40,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:40,461 INFO L521 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] [2021-05-21 20:31:40,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 20:31:40,677 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-05-21 20:31:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:40,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869345180] [2021-05-21 20:31:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869345180] [2021-05-21 20:31:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869345180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93147554] [2021-05-21 20:31:40,816 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 [2021-05-21 20:31:40,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:31:40,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93147554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:41,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:41,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:41,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49048765] [2021-05-21 20:31:41,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:41,044 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) [2021-05-21 20:31:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:41,610 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-05-21 20:31:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:41,610 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 [2021-05-21 20:31:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:41,626 INFO L225 Difference]: With dead ends: 16313 [2021-05-21 20:31:41,626 INFO L226 Difference]: Without dead ends: 16296 [2021-05-21 20:31:41,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:31:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-05-21 20:31:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-05-21 20:31:41,792 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) [2021-05-21 20:31:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-05-21 20:31:41,814 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-05-21 20:31:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:41,814 INFO L482 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-05-21 20:31:41,814 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) [2021-05-21 20:31:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-05-21 20:31:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:41,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:41,823 INFO L521 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] [2021-05-21 20:31:42,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:42,024 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:42,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-05-21 20:31:42,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:42,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912175611] [2021-05-21 20:31:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:42,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:42,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912175611] [2021-05-21 20:31:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912175611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:42,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427581301] [2021-05-21 20:31:42,163 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 [2021-05-21 20:31:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:42,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427581301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:42,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:42,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:42,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704817282] [2021-05-21 20:31:42,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:42,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:42,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:42,384 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) [2021-05-21 20:31:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:42,894 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-05-21 20:31:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:42,894 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 [2021-05-21 20:31:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:42,910 INFO L225 Difference]: With dead ends: 16694 [2021-05-21 20:31:42,910 INFO L226 Difference]: Without dead ends: 16677 [2021-05-21 20:31:42,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-05-21 20:31:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-05-21 20:31:43,053 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) [2021-05-21 20:31:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-05-21 20:31:43,075 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-05-21 20:31:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:43,076 INFO L482 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-05-21 20:31:43,076 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) [2021-05-21 20:31:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-05-21 20:31:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:43,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:43,084 INFO L521 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] [2021-05-21 20:31:43,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:43,285 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-05-21 20:31:43,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:43,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109697638] [2021-05-21 20:31:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:43,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:43,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109697638] [2021-05-21 20:31:43,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109697638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:43,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905814432] [2021-05-21 20:31:43,413 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 [2021-05-21 20:31:43,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:43,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905814432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:43,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:43,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:43,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921321406] [2021-05-21 20:31:43,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:43,653 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) [2021-05-21 20:31:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:44,179 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-05-21 20:31:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:44,179 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 [2021-05-21 20:31:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:44,195 INFO L225 Difference]: With dead ends: 16910 [2021-05-21 20:31:44,195 INFO L226 Difference]: Without dead ends: 16893 [2021-05-21 20:31:44,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-05-21 20:31:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-05-21 20:31:44,340 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) [2021-05-21 20:31:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-05-21 20:31:44,364 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-05-21 20:31:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:44,364 INFO L482 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-05-21 20:31:44,364 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) [2021-05-21 20:31:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-05-21 20:31:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:44,374 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:44,374 INFO L521 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] [2021-05-21 20:31:44,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:44,575 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-05-21 20:31:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:44,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752165888] [2021-05-21 20:31:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752165888] [2021-05-21 20:31:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752165888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364713390] [2021-05-21 20:31:44,700 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 [2021-05-21 20:31:44,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:31:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:44,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364713390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:44,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:44,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 20:31:44,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198520771] [2021-05-21 20:31:44,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 20:31:44,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 20:31:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:31:44,997 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) [2021-05-21 20:31:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:45,924 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-05-21 20:31:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:31:45,925 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 [2021-05-21 20:31:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:45,944 INFO L225 Difference]: With dead ends: 18935 [2021-05-21 20:31:45,944 INFO L226 Difference]: Without dead ends: 18918 [2021-05-21 20:31:45,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:31:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-05-21 20:31:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-05-21 20:31:46,131 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) [2021-05-21 20:31:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-05-21 20:31:46,156 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-05-21 20:31:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:46,156 INFO L482 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-05-21 20:31:46,156 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) [2021-05-21 20:31:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-05-21 20:31:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:46,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:46,165 INFO L521 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] [2021-05-21 20:31:46,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-21 20:31:46,380 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-05-21 20:31:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:46,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777061620] [2021-05-21 20:31:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:46,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:46,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777061620] [2021-05-21 20:31:46,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777061620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:46,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112952272] [2021-05-21 20:31:46,504 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 [2021-05-21 20:31:46,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:46,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112952272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:46,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:46,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:31:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274127024] [2021-05-21 20:31:46,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:46,740 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) [2021-05-21 20:31:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:47,225 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-05-21 20:31:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:47,226 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 [2021-05-21 20:31:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:47,244 INFO L225 Difference]: With dead ends: 17863 [2021-05-21 20:31:47,244 INFO L226 Difference]: Without dead ends: 17829 [2021-05-21 20:31:47,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:31:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-05-21 20:31:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-05-21 20:31:47,406 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) [2021-05-21 20:31:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-05-21 20:31:47,431 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-05-21 20:31:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-05-21 20:31:47,432 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) [2021-05-21 20:31:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-05-21 20:31:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:47,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:47,441 INFO L521 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] [2021-05-21 20:31:47,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:47,641 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-05-21 20:31:47,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:47,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842395856] [2021-05-21 20:31:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:47,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842395856] [2021-05-21 20:31:47,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842395856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:47,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252844094] [2021-05-21 20:31:47,766 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 [2021-05-21 20:31:47,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:31:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:48,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252844094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:48,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:48,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:31:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683158299] [2021-05-21 20:31:48,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:31:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:31:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:48,088 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) [2021-05-21 20:31:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:48,688 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-05-21 20:31:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:31:48,689 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 [2021-05-21 20:31:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:48,709 INFO L225 Difference]: With dead ends: 20211 [2021-05-21 20:31:48,709 INFO L226 Difference]: Without dead ends: 20168 [2021-05-21 20:31:48,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:31:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-05-21 20:31:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-05-21 20:31:48,906 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) [2021-05-21 20:31:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-05-21 20:31:48,933 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-05-21 20:31:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:48,933 INFO L482 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-05-21 20:31:48,933 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) [2021-05-21 20:31:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-05-21 20:31:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:48,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:48,943 INFO L521 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] [2021-05-21 20:31:49,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:49,145 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-05-21 20:31:49,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:49,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725789162] [2021-05-21 20:31:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:49,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:49,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725789162] [2021-05-21 20:31:49,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725789162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:49,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072017379] [2021-05-21 20:31:49,278 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 [2021-05-21 20:31:49,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:31:49,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072017379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:49,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:49,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:49,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262594039] [2021-05-21 20:31:49,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:49,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:49,510 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) [2021-05-21 20:31:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:50,024 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-05-21 20:31:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:50,024 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 [2021-05-21 20:31:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:50,043 INFO L225 Difference]: With dead ends: 19446 [2021-05-21 20:31:50,043 INFO L226 Difference]: Without dead ends: 19429 [2021-05-21 20:31:50,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:31:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-05-21 20:31:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-05-21 20:31:50,211 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) [2021-05-21 20:31:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-05-21 20:31:50,320 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-05-21 20:31:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:50,320 INFO L482 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-05-21 20:31:50,320 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) [2021-05-21 20:31:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-05-21 20:31:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:50,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:50,328 INFO L521 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] [2021-05-21 20:31:50,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:50,529 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-05-21 20:31:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:50,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086357501] [2021-05-21 20:31:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:50,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086357501] [2021-05-21 20:31:50,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086357501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165970756] [2021-05-21 20:31:50,654 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 [2021-05-21 20:31:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:50,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:50,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:50,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165970756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:50,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:50,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:50,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631289826] [2021-05-21 20:31:50,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:50,870 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) [2021-05-21 20:31:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:51,334 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-05-21 20:31:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:31:51,335 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 [2021-05-21 20:31:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:51,354 INFO L225 Difference]: With dead ends: 19790 [2021-05-21 20:31:51,354 INFO L226 Difference]: Without dead ends: 19773 [2021-05-21 20:31:51,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-05-21 20:31:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-05-21 20:31:51,538 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) [2021-05-21 20:31:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-05-21 20:31:51,565 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-05-21 20:31:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:51,565 INFO L482 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-05-21 20:31:51,565 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) [2021-05-21 20:31:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-05-21 20:31:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:51,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:51,575 INFO L521 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] [2021-05-21 20:31:51,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-21 20:31:51,775 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-05-21 20:31:51,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:51,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251633774] [2021-05-21 20:31:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:51,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251633774] [2021-05-21 20:31:51,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251633774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635398086] [2021-05-21 20:31:51,908 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 [2021-05-21 20:31:51,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:31:51,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635398086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:52,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:52,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:52,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353245421] [2021-05-21 20:31:52,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:52,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:52,129 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) [2021-05-21 20:31:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:52,603 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-05-21 20:31:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:31:52,603 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 [2021-05-21 20:31:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:52,624 INFO L225 Difference]: With dead ends: 20173 [2021-05-21 20:31:52,624 INFO L226 Difference]: Without dead ends: 20156 [2021-05-21 20:31:52,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-05-21 20:31:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-05-21 20:31:52,840 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) [2021-05-21 20:31:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-05-21 20:31:52,868 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-05-21 20:31:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:52,868 INFO L482 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-05-21 20:31:52,868 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) [2021-05-21 20:31:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-05-21 20:31:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:52,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:52,879 INFO L521 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] [2021-05-21 20:31:53,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:53,079 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-05-21 20:31:53,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:53,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406753121] [2021-05-21 20:31:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:53,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406753121] [2021-05-21 20:31:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406753121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746673095] [2021-05-21 20:31:53,203 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 [2021-05-21 20:31:53,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:31:53,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:53,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746673095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:53,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:53,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:53,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75164980] [2021-05-21 20:31:53,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:53,426 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) [2021-05-21 20:31:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:54,017 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-05-21 20:31:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:31:54,017 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 [2021-05-21 20:31:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:54,038 INFO L225 Difference]: With dead ends: 20811 [2021-05-21 20:31:54,039 INFO L226 Difference]: Without dead ends: 20777 [2021-05-21 20:31:54,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:31:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-05-21 20:31:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-05-21 20:31:54,224 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) [2021-05-21 20:31:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-05-21 20:31:54,254 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-05-21 20:31:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:54,254 INFO L482 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-05-21 20:31:54,254 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) [2021-05-21 20:31:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-05-21 20:31:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:54,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:54,265 INFO L521 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] [2021-05-21 20:31:54,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:54,465 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-05-21 20:31:54,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:54,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893836163] [2021-05-21 20:31:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:54,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:54,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893836163] [2021-05-21 20:31:54,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893836163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:54,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51486560] [2021-05-21 20:31:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:31:54,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:31:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:31:54,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51486560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:54,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:54,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:31:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701645403] [2021-05-21 20:31:54,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:31:54,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:31:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:31:54,881 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) [2021-05-21 20:31:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:55,607 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-05-21 20:31:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:55,607 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 [2021-05-21 20:31:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:55,630 INFO L225 Difference]: With dead ends: 23109 [2021-05-21 20:31:55,630 INFO L226 Difference]: Without dead ends: 23066 [2021-05-21 20:31:55,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:31:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-05-21 20:31:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-05-21 20:31:55,835 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) [2021-05-21 20:31:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-05-21 20:31:55,867 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-05-21 20:31:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:55,867 INFO L482 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-05-21 20:31:55,867 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) [2021-05-21 20:31:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-05-21 20:31:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:55,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:55,879 INFO L521 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] [2021-05-21 20:31:56,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 20:31:56,080 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-05-21 20:31:56,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:56,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070743238] [2021-05-21 20:31:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:56,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070743238] [2021-05-21 20:31:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070743238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784323791] [2021-05-21 20:31:56,210 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 [2021-05-21 20:31:56,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:31:56,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:56,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784323791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:56,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:56,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:31:56,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932244199] [2021-05-21 20:31:56,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:31:56,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:31:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:31:56,450 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) [2021-05-21 20:31:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:57,078 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-05-21 20:31:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:31:57,079 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 [2021-05-21 20:31:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:57,103 INFO L225 Difference]: With dead ends: 23617 [2021-05-21 20:31:57,104 INFO L226 Difference]: Without dead ends: 23583 [2021-05-21 20:31:57,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:31:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-05-21 20:31:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-05-21 20:31:57,321 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) [2021-05-21 20:31:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-05-21 20:31:57,459 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-05-21 20:31:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:57,459 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-05-21 20:31:57,459 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) [2021-05-21 20:31:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-05-21 20:31:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:57,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:57,471 INFO L521 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] [2021-05-21 20:31:57,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:57,671 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-05-21 20:31:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036345714] [2021-05-21 20:31:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:57,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:57,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036345714] [2021-05-21 20:31:57,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036345714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:57,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717231990] [2021-05-21 20:31:57,812 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 [2021-05-21 20:31:57,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:31:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:31:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717231990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:58,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:58,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:58,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528801289] [2021-05-21 20:31:58,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:58,052 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) [2021-05-21 20:31:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:58,608 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-05-21 20:31:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:31:58,608 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 [2021-05-21 20:31:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:58,633 INFO L225 Difference]: With dead ends: 22805 [2021-05-21 20:31:58,633 INFO L226 Difference]: Without dead ends: 22788 [2021-05-21 20:31:58,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-05-21 20:31:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-05-21 20:31:58,852 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) [2021-05-21 20:31:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-05-21 20:31:58,884 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-05-21 20:31:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:31:58,884 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-05-21 20:31:58,884 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) [2021-05-21 20:31:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-05-21 20:31:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:31:58,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:31:58,896 INFO L521 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] [2021-05-21 20:31:59,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:31:59,097 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:31:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:31:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-05-21 20:31:59,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:31:59,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216642495] [2021-05-21 20:31:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:31:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:31:59,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:31:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216642495] [2021-05-21 20:31:59,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216642495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716006838] [2021-05-21 20:31:59,220 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 [2021-05-21 20:31:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:31:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:31:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:31:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:31:59,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716006838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:31:59,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:31:59,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:31:59,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965629074] [2021-05-21 20:31:59,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:31:59,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:31:59,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:31:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:31:59,442 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) [2021-05-21 20:31:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:31:59,957 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-05-21 20:31:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:31:59,957 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 [2021-05-21 20:31:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:31:59,982 INFO L225 Difference]: With dead ends: 23126 [2021-05-21 20:31:59,982 INFO L226 Difference]: Without dead ends: 23109 [2021-05-21 20:31:59,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:31:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-05-21 20:32:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-05-21 20:32:00,283 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) [2021-05-21 20:32:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-05-21 20:32:00,314 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-05-21 20:32:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:00,314 INFO L482 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-05-21 20:32:00,314 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) [2021-05-21 20:32:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-05-21 20:32:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:00,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:00,327 INFO L521 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] [2021-05-21 20:32:00,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:00,528 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-05-21 20:32:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:00,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079829635] [2021-05-21 20:32:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:00,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:00,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079829635] [2021-05-21 20:32:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079829635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:00,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723293861] [2021-05-21 20:32:00,654 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 [2021-05-21 20:32:00,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:00,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723293861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:00,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698644455] [2021-05-21 20:32:00,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:00,879 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) [2021-05-21 20:32:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:01,519 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-05-21 20:32:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:32:01,520 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 [2021-05-21 20:32:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:01,544 INFO L225 Difference]: With dead ends: 24322 [2021-05-21 20:32:01,544 INFO L226 Difference]: Without dead ends: 24288 [2021-05-21 20:32:01,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:32:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-05-21 20:32:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-05-21 20:32:01,766 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) [2021-05-21 20:32:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-05-21 20:32:01,799 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-05-21 20:32:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:01,799 INFO L482 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-05-21 20:32:01,799 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) [2021-05-21 20:32:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-05-21 20:32:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:01,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:01,812 INFO L521 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] [2021-05-21 20:32:02,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:02,012 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-05-21 20:32:02,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:02,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697095963] [2021-05-21 20:32:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697095963] [2021-05-21 20:32:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697095963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289516484] [2021-05-21 20:32:02,135 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 [2021-05-21 20:32:02,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:32:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289516484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:32:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630266449] [2021-05-21 20:32:02,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:32:02,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:32:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:32:02,387 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) [2021-05-21 20:32:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:03,312 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-05-21 20:32:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:32:03,312 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 [2021-05-21 20:32:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:03,345 INFO L225 Difference]: With dead ends: 27871 [2021-05-21 20:32:03,345 INFO L226 Difference]: Without dead ends: 27837 [2021-05-21 20:32:03,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:32:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-05-21 20:32:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-05-21 20:32:03,653 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) [2021-05-21 20:32:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-05-21 20:32:03,691 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-05-21 20:32:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:03,691 INFO L482 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-05-21 20:32:03,691 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) [2021-05-21 20:32:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-05-21 20:32:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:03,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:03,705 INFO L521 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] [2021-05-21 20:32:03,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:03,905 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-05-21 20:32:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:03,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267716743] [2021-05-21 20:32:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:04,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267716743] [2021-05-21 20:32:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267716743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094824031] [2021-05-21 20:32:04,030 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 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 [2021-05-21 20:32:04,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:04,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:04,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094824031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:04,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:04,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:32:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462119629] [2021-05-21 20:32:04,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:32:04,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:04,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:32:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:32:04,278 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) [2021-05-21 20:32:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:05,049 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-05-21 20:32:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:32:05,050 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 [2021-05-21 20:32:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:05,080 INFO L225 Difference]: With dead ends: 28307 [2021-05-21 20:32:05,080 INFO L226 Difference]: Without dead ends: 28255 [2021-05-21 20:32:05,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:32:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-05-21 20:32:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-05-21 20:32:05,351 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) [2021-05-21 20:32:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-05-21 20:32:05,393 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-05-21 20:32:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:05,393 INFO L482 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-05-21 20:32:05,393 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) [2021-05-21 20:32:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-05-21 20:32:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:05,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:05,408 INFO L521 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] [2021-05-21 20:32:05,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:05,608 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-05-21 20:32:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:05,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667244595] [2021-05-21 20:32:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:05,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:05,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667244595] [2021-05-21 20:32:05,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667244595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:05,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312655549] [2021-05-21 20:32:05,741 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 [2021-05-21 20:32:05,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:32:05,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312655549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:05,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:05,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714357588] [2021-05-21 20:32:06,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:06,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:06,090 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) [2021-05-21 20:32:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:06,615 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-05-21 20:32:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:32:06,615 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 [2021-05-21 20:32:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:06,646 INFO L225 Difference]: With dead ends: 27788 [2021-05-21 20:32:06,646 INFO L226 Difference]: Without dead ends: 27745 [2021-05-21 20:32:06,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:32:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-05-21 20:32:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-05-21 20:32:06,917 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) [2021-05-21 20:32:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-05-21 20:32:06,961 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-05-21 20:32:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:06,961 INFO L482 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-05-21 20:32:06,961 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) [2021-05-21 20:32:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-05-21 20:32:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:06,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:06,975 INFO L521 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] [2021-05-21 20:32:07,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-21 20:32:07,176 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:07,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-05-21 20:32:07,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:07,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495498598] [2021-05-21 20:32:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:07,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495498598] [2021-05-21 20:32:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495498598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531201708] [2021-05-21 20:32:07,297 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 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 [2021-05-21 20:32:07,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:32:07,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:07,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531201708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:07,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:07,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 20:32:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890135871] [2021-05-21 20:32:07,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 20:32:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 20:32:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:32:07,593 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) [2021-05-21 20:32:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:08,702 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-05-21 20:32:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:32:08,702 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 [2021-05-21 20:32:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:08,744 INFO L225 Difference]: With dead ends: 36328 [2021-05-21 20:32:08,744 INFO L226 Difference]: Without dead ends: 36251 [2021-05-21 20:32:08,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:32:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-05-21 20:32:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-05-21 20:32:09,209 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) [2021-05-21 20:32:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-05-21 20:32:09,262 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-05-21 20:32:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:09,262 INFO L482 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-05-21 20:32:09,262 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) [2021-05-21 20:32:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-05-21 20:32:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:09,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:09,277 INFO L521 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] [2021-05-21 20:32:09,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:09,478 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:09,478 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-05-21 20:32:09,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:09,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865576725] [2021-05-21 20:32:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:09,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865576725] [2021-05-21 20:32:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865576725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904409906] [2021-05-21 20:32:09,612 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 [2021-05-21 20:32:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:09,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904409906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:09,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:09,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:32:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697188196] [2021-05-21 20:32:09,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:32:09,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:09,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:32:09,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:32:09,869 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) [2021-05-21 20:32:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:10,601 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-05-21 20:32:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:32:10,602 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 [2021-05-21 20:32:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:10,639 INFO L225 Difference]: With dead ends: 33748 [2021-05-21 20:32:10,639 INFO L226 Difference]: Without dead ends: 33715 [2021-05-21 20:32:10,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:32:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-05-21 20:32:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-05-21 20:32:10,972 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) [2021-05-21 20:32:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-05-21 20:32:11,023 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-05-21 20:32:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:11,023 INFO L482 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-05-21 20:32:11,023 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) [2021-05-21 20:32:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-05-21 20:32:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:11,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:11,038 INFO L521 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] [2021-05-21 20:32:11,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-21 20:32:11,238 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-05-21 20:32:11,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:11,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677919209] [2021-05-21 20:32:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:11,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:11,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677919209] [2021-05-21 20:32:11,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677919209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:11,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191620980] [2021-05-21 20:32:11,363 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 [2021-05-21 20:32:11,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:11,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:11,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191620980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:11,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:11,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-05-21 20:32:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512512833] [2021-05-21 20:32:11,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:32:11,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:32:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:32:11,600 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) [2021-05-21 20:32:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:12,089 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-05-21 20:32:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:32:12,090 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 [2021-05-21 20:32:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:12,130 INFO L225 Difference]: With dead ends: 35110 [2021-05-21 20:32:12,130 INFO L226 Difference]: Without dead ends: 35069 [2021-05-21 20:32:12,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:32:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-05-21 20:32:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-05-21 20:32:12,551 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) [2021-05-21 20:32:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-05-21 20:32:12,605 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-05-21 20:32:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:12,605 INFO L482 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-05-21 20:32:12,605 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) [2021-05-21 20:32:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-05-21 20:32:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:12,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:12,620 INFO L521 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] [2021-05-21 20:32:12,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 20:32:12,821 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-05-21 20:32:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:12,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062035158] [2021-05-21 20:32:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:12,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062035158] [2021-05-21 20:32:12,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062035158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802272399] [2021-05-21 20:32:12,949 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 [2021-05-21 20:32:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:32:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:13,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802272399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:13,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:13,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 20:32:13,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586409183] [2021-05-21 20:32:13,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 20:32:13,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 20:32:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:32:13,240 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) [2021-05-21 20:32:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:14,375 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-05-21 20:32:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 20:32:14,376 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 [2021-05-21 20:32:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:14,421 INFO L225 Difference]: With dead ends: 40688 [2021-05-21 20:32:14,421 INFO L226 Difference]: Without dead ends: 40654 [2021-05-21 20:32:14,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 744.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:32:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-05-21 20:32:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-05-21 20:32:14,820 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) [2021-05-21 20:32:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-05-21 20:32:14,879 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-05-21 20:32:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:14,879 INFO L482 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-05-21 20:32:14,879 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) [2021-05-21 20:32:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-05-21 20:32:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:14,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:14,895 INFO L521 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] [2021-05-21 20:32:15,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:15,097 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-05-21 20:32:15,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:15,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37043279] [2021-05-21 20:32:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:15,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37043279] [2021-05-21 20:32:15,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37043279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230886876] [2021-05-21 20:32:15,219 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 [2021-05-21 20:32:15,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:15,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:15,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230886876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:15,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:15,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:32:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881246894] [2021-05-21 20:32:15,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:32:15,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:32:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:32:15,603 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) [2021-05-21 20:32:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:16,367 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-05-21 20:32:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:32:16,367 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 [2021-05-21 20:32:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:16,415 INFO L225 Difference]: With dead ends: 40320 [2021-05-21 20:32:16,415 INFO L226 Difference]: Without dead ends: 40277 [2021-05-21 20:32:16,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:32:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-05-21 20:32:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-05-21 20:32:16,811 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) [2021-05-21 20:32:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-05-21 20:32:16,868 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-05-21 20:32:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:16,868 INFO L482 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-05-21 20:32:16,868 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) [2021-05-21 20:32:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-05-21 20:32:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:16,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:16,885 INFO L521 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] [2021-05-21 20:32:17,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:17,085 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-05-21 20:32:17,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:17,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656121311] [2021-05-21 20:32:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:17,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:17,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656121311] [2021-05-21 20:32:17,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656121311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:17,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694805929] [2021-05-21 20:32:17,214 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 [2021-05-21 20:32:17,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:32:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:17,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694805929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:17,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:17,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:32:17,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205593086] [2021-05-21 20:32:17,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:32:17,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:17,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:32:17,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:32:17,456 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) [2021-05-21 20:32:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:18,051 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-05-21 20:32:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:18,051 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 [2021-05-21 20:32:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:18,097 INFO L225 Difference]: With dead ends: 39152 [2021-05-21 20:32:18,098 INFO L226 Difference]: Without dead ends: 39118 [2021-05-21 20:32:18,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:32:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-05-21 20:32:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-05-21 20:32:18,616 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) [2021-05-21 20:32:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-05-21 20:32:18,676 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-05-21 20:32:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:18,676 INFO L482 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-05-21 20:32:18,676 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) [2021-05-21 20:32:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-05-21 20:32:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:18,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:18,693 INFO L521 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] [2021-05-21 20:32:18,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:18,893 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-05-21 20:32:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:18,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108097149] [2021-05-21 20:32:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:19,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108097149] [2021-05-21 20:32:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108097149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:19,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518678374] [2021-05-21 20:32:19,046 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 [2021-05-21 20:32:19,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:32:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:19,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518678374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:19,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:19,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727895627] [2021-05-21 20:32:19,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:19,297 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) [2021-05-21 20:32:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:19,924 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-05-21 20:32:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:19,924 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 [2021-05-21 20:32:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:19,969 INFO L225 Difference]: With dead ends: 39710 [2021-05-21 20:32:19,969 INFO L226 Difference]: Without dead ends: 39676 [2021-05-21 20:32:19,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:32:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-05-21 20:32:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-05-21 20:32:20,351 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) [2021-05-21 20:32:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-05-21 20:32:20,410 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-05-21 20:32:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:20,410 INFO L482 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-05-21 20:32:20,410 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) [2021-05-21 20:32:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-05-21 20:32:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:20,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:20,427 INFO L521 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] [2021-05-21 20:32:20,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-21 20:32:20,627 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-05-21 20:32:20,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:20,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472121428] [2021-05-21 20:32:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:20,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:20,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472121428] [2021-05-21 20:32:20,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472121428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:20,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707163738] [2021-05-21 20:32:20,751 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 [2021-05-21 20:32:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707163738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:20,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:20,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:32:20,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65336560] [2021-05-21 20:32:20,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:32:20,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:32:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:32:20,989 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) [2021-05-21 20:32:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:21,580 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-05-21 20:32:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:21,581 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 [2021-05-21 20:32:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:21,627 INFO L225 Difference]: With dead ends: 41067 [2021-05-21 20:32:21,627 INFO L226 Difference]: Without dead ends: 41033 [2021-05-21 20:32:21,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:32:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-05-21 20:32:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-05-21 20:32:22,165 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) [2021-05-21 20:32:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-05-21 20:32:22,229 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-05-21 20:32:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:22,230 INFO L482 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-05-21 20:32:22,230 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) [2021-05-21 20:32:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-05-21 20:32:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:22,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:22,246 INFO L521 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] [2021-05-21 20:32:22,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:22,447 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-05-21 20:32:22,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:22,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159160548] [2021-05-21 20:32:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:22,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159160548] [2021-05-21 20:32:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159160548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421897156] [2021-05-21 20:32:22,581 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 [2021-05-21 20:32:22,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:22,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:22,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421897156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:22,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:22,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:32:22,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278806284] [2021-05-21 20:32:22,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:32:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:32:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:32:22,849 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) [2021-05-21 20:32:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:23,593 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-05-21 20:32:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:32:23,594 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 [2021-05-21 20:32:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:23,643 INFO L225 Difference]: With dead ends: 42419 [2021-05-21 20:32:23,643 INFO L226 Difference]: Without dead ends: 42376 [2021-05-21 20:32:23,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:32:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-05-21 20:32:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-05-21 20:32:24,075 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) [2021-05-21 20:32:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-05-21 20:32:24,137 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-05-21 20:32:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:24,137 INFO L482 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-05-21 20:32:24,137 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) [2021-05-21 20:32:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-05-21 20:32:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:24,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:24,155 INFO L521 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] [2021-05-21 20:32:24,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-21 20:32:24,355 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:24,355 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-05-21 20:32:24,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:24,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155904704] [2021-05-21 20:32:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:24,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155904704] [2021-05-21 20:32:24,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155904704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:24,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771705803] [2021-05-21 20:32:24,479 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 [2021-05-21 20:32:24,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:32:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:24,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771705803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:24,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:24,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:24,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985917633] [2021-05-21 20:32:24,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:24,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:24,704 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) [2021-05-21 20:32:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:25,271 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-05-21 20:32:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:32:25,271 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 [2021-05-21 20:32:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:25,317 INFO L225 Difference]: With dead ends: 40507 [2021-05-21 20:32:25,317 INFO L226 Difference]: Without dead ends: 40490 [2021-05-21 20:32:25,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:32:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-05-21 20:32:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-05-21 20:32:25,809 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) [2021-05-21 20:32:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-05-21 20:32:25,870 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-05-21 20:32:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:25,870 INFO L482 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-05-21 20:32:25,870 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) [2021-05-21 20:32:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-05-21 20:32:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:25,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:25,887 INFO L521 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] [2021-05-21 20:32:26,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:26,089 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-05-21 20:32:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:26,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733960957] [2021-05-21 20:32:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:26,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:26,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733960957] [2021-05-21 20:32:26,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733960957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:26,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244591959] [2021-05-21 20:32:26,214 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 [2021-05-21 20:32:26,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:26,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:26,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244591959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:26,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:26,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:26,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397516651] [2021-05-21 20:32:26,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:26,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:26,443 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) [2021-05-21 20:32:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:26,968 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-05-21 20:32:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:32:26,969 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 [2021-05-21 20:32:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:27,015 INFO L225 Difference]: With dead ends: 40827 [2021-05-21 20:32:27,015 INFO L226 Difference]: Without dead ends: 40810 [2021-05-21 20:32:27,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:32:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-05-21 20:32:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-05-21 20:32:27,415 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) [2021-05-21 20:32:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-05-21 20:32:27,477 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-05-21 20:32:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:27,477 INFO L482 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-05-21 20:32:27,477 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) [2021-05-21 20:32:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-05-21 20:32:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:27,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:27,495 INFO L521 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] [2021-05-21 20:32:27,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:27,695 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-05-21 20:32:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:27,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008475704] [2021-05-21 20:32:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:27,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008475704] [2021-05-21 20:32:27,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008475704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268577191] [2021-05-21 20:32:27,819 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 [2021-05-21 20:32:27,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:32:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:27,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:28,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268577191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:28,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:28,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-21 20:32:28,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688545013] [2021-05-21 20:32:28,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 20:32:28,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 20:32:28,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:32:28,095 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) [2021-05-21 20:32:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:28,868 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-05-21 20:32:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:32:28,868 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 [2021-05-21 20:32:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:28,915 INFO L225 Difference]: With dead ends: 41685 [2021-05-21 20:32:28,915 INFO L226 Difference]: Without dead ends: 41668 [2021-05-21 20:32:28,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:32:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-05-21 20:32:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-05-21 20:32:29,318 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) [2021-05-21 20:32:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-05-21 20:32:29,379 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-05-21 20:32:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:29,379 INFO L482 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-05-21 20:32:29,379 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) [2021-05-21 20:32:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-05-21 20:32:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:29,551 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:29,552 INFO L521 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] [2021-05-21 20:32:29,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-21 20:32:29,752 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-05-21 20:32:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:29,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077622297] [2021-05-21 20:32:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:29,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:29,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077622297] [2021-05-21 20:32:29,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077622297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:29,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804787418] [2021-05-21 20:32:29,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:32:29,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:32:29,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:30,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804787418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:30,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:30,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:30,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129034493] [2021-05-21 20:32:30,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:30,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:30,094 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) [2021-05-21 20:32:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:30,734 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-05-21 20:32:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:30,735 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 [2021-05-21 20:32:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:30,781 INFO L225 Difference]: With dead ends: 41871 [2021-05-21 20:32:30,781 INFO L226 Difference]: Without dead ends: 41837 [2021-05-21 20:32:30,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:32:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-05-21 20:32:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-05-21 20:32:31,199 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) [2021-05-21 20:32:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-05-21 20:32:31,262 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-05-21 20:32:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:31,262 INFO L482 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-05-21 20:32:31,263 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) [2021-05-21 20:32:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-05-21 20:32:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:31,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:31,281 INFO L521 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] [2021-05-21 20:32:31,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 20:32:31,481 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-05-21 20:32:31,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:31,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592729958] [2021-05-21 20:32:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:31,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592729958] [2021-05-21 20:32:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592729958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:31,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218633967] [2021-05-21 20:32:31,602 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 [2021-05-21 20:32:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:31,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218633967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:31,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:31,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-21 20:32:31,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927819158] [2021-05-21 20:32:31,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:32:31,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:32:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:32:31,847 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) [2021-05-21 20:32:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:32,541 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-05-21 20:32:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:32,542 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 [2021-05-21 20:32:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:32,590 INFO L225 Difference]: With dead ends: 43352 [2021-05-21 20:32:32,590 INFO L226 Difference]: Without dead ends: 43318 [2021-05-21 20:32:32,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:32:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-05-21 20:32:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-05-21 20:32:33,025 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) [2021-05-21 20:32:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-05-21 20:32:33,092 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-05-21 20:32:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:33,092 INFO L482 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-05-21 20:32:33,092 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) [2021-05-21 20:32:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-05-21 20:32:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:33,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:33,110 INFO L521 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] [2021-05-21 20:32:33,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:33,310 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-05-21 20:32:33,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:33,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527643902] [2021-05-21 20:32:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:33,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527643902] [2021-05-21 20:32:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527643902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43913787] [2021-05-21 20:32:33,435 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 [2021-05-21 20:32:33,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:33,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:33,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43913787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:33,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:33,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-21 20:32:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882874512] [2021-05-21 20:32:33,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 20:32:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 20:32:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:32:33,683 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) [2021-05-21 20:32:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:34,221 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-05-21 20:32:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:32:34,222 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 [2021-05-21 20:32:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:34,272 INFO L225 Difference]: With dead ends: 44617 [2021-05-21 20:32:34,272 INFO L226 Difference]: Without dead ends: 44574 [2021-05-21 20:32:34,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:32:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-05-21 20:32:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-05-21 20:32:34,724 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) [2021-05-21 20:32:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-05-21 20:32:34,792 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-05-21 20:32:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:34,792 INFO L482 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-05-21 20:32:34,792 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) [2021-05-21 20:32:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-05-21 20:32:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:34,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:34,812 INFO L521 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] [2021-05-21 20:32:35,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 20:32:35,013 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-05-21 20:32:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:35,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041426537] [2021-05-21 20:32:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:35,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041426537] [2021-05-21 20:32:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041426537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470791402] [2021-05-21 20:32:35,136 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 [2021-05-21 20:32:35,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:32:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:35,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470791402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:35,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:35,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292488803] [2021-05-21 20:32:35,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:35,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:35,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:35,358 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) [2021-05-21 20:32:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:35,865 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-05-21 20:32:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:32:35,865 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 [2021-05-21 20:32:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:35,915 INFO L225 Difference]: With dead ends: 43750 [2021-05-21 20:32:35,915 INFO L226 Difference]: Without dead ends: 43733 [2021-05-21 20:32:35,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:32:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-05-21 20:32:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-05-21 20:32:36,418 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) [2021-05-21 20:32:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-05-21 20:32:36,485 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-05-21 20:32:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:36,485 INFO L482 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-05-21 20:32:36,485 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) [2021-05-21 20:32:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-05-21 20:32:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 20:32:36,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:36,503 INFO L521 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] [2021-05-21 20:32:36,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:32:36,704 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-05-21 20:32:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:36,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380190975] [2021-05-21 20:32:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:32:36,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380190975] [2021-05-21 20:32:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380190975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229348860] [2021-05-21 20:32:36,828 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 [2021-05-21 20:32:36,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:36,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 20:32:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229348860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:37,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:37,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-21 20:32:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521634298] [2021-05-21 20:32:37,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:32:37,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:32:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:32:37,058 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) [2021-05-21 20:32:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:37,538 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-05-21 20:32:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:32:37,538 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 [2021-05-21 20:32:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:37,592 INFO L225 Difference]: With dead ends: 44087 [2021-05-21 20:32:37,592 INFO L226 Difference]: Without dead ends: 44070 [2021-05-21 20:32:37,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:32:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-05-21 20:32:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-05-21 20:32:38,026 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) [2021-05-21 20:32:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-05-21 20:32:38,093 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-05-21 20:32:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:38,094 INFO L482 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-05-21 20:32:38,094 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) [2021-05-21 20:32:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-05-21 20:32:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:38,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:38,112 INFO L521 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] [2021-05-21 20:32:38,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 20:32:38,313 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:38,313 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-05-21 20:32:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:38,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229260467] [2021-05-21 20:32:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229260467] [2021-05-21 20:32:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229260467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446718855] [2021-05-21 20:32:38,341 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 [2021-05-21 20:32:38,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:32:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:38,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446718855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:38,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:38,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:32:38,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106702307] [2021-05-21 20:32:38,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:32:38,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:32:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:32:38,402 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) [2021-05-21 20:32:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:38,592 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-05-21 20:32:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:32:38,592 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 [2021-05-21 20:32:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:38,664 INFO L225 Difference]: With dead ends: 54955 [2021-05-21 20:32:38,664 INFO L226 Difference]: Without dead ends: 54921 [2021-05-21 20:32:38,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:32:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-05-21 20:32:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-05-21 20:32:39,421 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) [2021-05-21 20:32:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-05-21 20:32:39,518 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-05-21 20:32:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:39,518 INFO L482 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-05-21 20:32:39,518 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) [2021-05-21 20:32:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-05-21 20:32:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:39,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:39,537 INFO L521 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] [2021-05-21 20:32:39,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:39,737 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-05-21 20:32:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:39,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274901364] [2021-05-21 20:32:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:39,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274901364] [2021-05-21 20:32:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274901364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84275258] [2021-05-21 20:32:39,757 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 [2021-05-21 20:32:39,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:32:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:39,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84275258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:32:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082174861] [2021-05-21 20:32:39,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:39,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:39,823 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) [2021-05-21 20:32:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:40,007 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-05-21 20:32:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:40,007 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 [2021-05-21 20:32:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:40,079 INFO L225 Difference]: With dead ends: 54798 [2021-05-21 20:32:40,080 INFO L226 Difference]: Without dead ends: 54798 [2021-05-21 20:32:40,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:32:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-05-21 20:32:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-05-21 20:32:40,659 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) [2021-05-21 20:32:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-05-21 20:32:40,739 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-05-21 20:32:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:40,739 INFO L482 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-05-21 20:32:40,739 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) [2021-05-21 20:32:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-05-21 20:32:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:40,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:40,756 INFO L521 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] [2021-05-21 20:32:40,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-21 20:32:40,956 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:40,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-05-21 20:32:40,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:40,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058210267] [2021-05-21 20:32:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:40,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:40,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058210267] [2021-05-21 20:32:40,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058210267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:40,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798974206] [2021-05-21 20:32:40,979 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 [2021-05-21 20:32:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:41,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798974206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:41,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:41,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:32:41,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882807710] [2021-05-21 20:32:41,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:41,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:41,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:41,037 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) [2021-05-21 20:32:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:41,199 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-05-21 20:32:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:32:41,200 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 [2021-05-21 20:32:41,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:41,261 INFO L225 Difference]: With dead ends: 51794 [2021-05-21 20:32:41,262 INFO L226 Difference]: Without dead ends: 51790 [2021-05-21 20:32:41,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:32:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-05-21 20:32:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-05-21 20:32:41,913 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) [2021-05-21 20:32:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-05-21 20:32:41,993 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-05-21 20:32:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:41,993 INFO L482 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-05-21 20:32:41,993 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) [2021-05-21 20:32:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-05-21 20:32:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:42,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:42,010 INFO L521 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] [2021-05-21 20:32:42,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-21 20:32:42,211 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-05-21 20:32:42,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:42,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454540330] [2021-05-21 20:32:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:42,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:42,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454540330] [2021-05-21 20:32:42,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454540330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:42,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914929269] [2021-05-21 20:32:42,238 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 [2021-05-21 20:32:42,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:42,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:32:42,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914929269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:42,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:42,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:32:42,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369677914] [2021-05-21 20:32:42,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:42,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:42,325 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) [2021-05-21 20:32:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:42,490 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-05-21 20:32:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:42,490 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 [2021-05-21 20:32:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:42,568 INFO L225 Difference]: With dead ends: 53808 [2021-05-21 20:32:42,568 INFO L226 Difference]: Without dead ends: 53805 [2021-05-21 20:32:42,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:32:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-05-21 20:32:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-05-21 20:32:43,326 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) [2021-05-21 20:32:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-05-21 20:32:43,416 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-05-21 20:32:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:43,416 INFO L482 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-05-21 20:32:43,416 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) [2021-05-21 20:32:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-05-21 20:32:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:43,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:43,435 INFO L521 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] [2021-05-21 20:32:43,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 20:32:43,636 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-05-21 20:32:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567560046] [2021-05-21 20:32:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:43,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567560046] [2021-05-21 20:32:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567560046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196449656] [2021-05-21 20:32:43,870 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 [2021-05-21 20:32:43,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:32:43,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196449656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:43,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:43,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:32:43,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611540185] [2021-05-21 20:32:43,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:32:43,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:32:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:32:43,940 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) [2021-05-21 20:32:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:44,114 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-05-21 20:32:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:44,114 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 [2021-05-21 20:32:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:44,275 INFO L225 Difference]: With dead ends: 52855 [2021-05-21 20:32:44,275 INFO L226 Difference]: Without dead ends: 52852 [2021-05-21 20:32:44,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:32:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-05-21 20:32:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-05-21 20:32:44,883 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) [2021-05-21 20:32:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-05-21 20:32:44,969 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-05-21 20:32:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:44,969 INFO L482 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-05-21 20:32:44,969 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) [2021-05-21 20:32:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-05-21 20:32:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:44,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:44,986 INFO L521 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] [2021-05-21 20:32:45,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:45,191 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-05-21 20:32:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:45,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880193974] [2021-05-21 20:32:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:45,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:45,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880193974] [2021-05-21 20:32:45,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880193974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:45,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945705627] [2021-05-21 20:32:45,214 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 [2021-05-21 20:32:45,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:45,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945705627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:45,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:45,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:32:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693792044] [2021-05-21 20:32:45,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:32:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:32:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:32:45,400 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) [2021-05-21 20:32:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:45,580 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-05-21 20:32:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:45,580 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 [2021-05-21 20:32:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:45,643 INFO L225 Difference]: With dead ends: 50891 [2021-05-21 20:32:45,643 INFO L226 Difference]: Without dead ends: 50871 [2021-05-21 20:32:45,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:32:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-05-21 20:32:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-05-21 20:32:46,265 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) [2021-05-21 20:32:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-05-21 20:32:46,349 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-05-21 20:32:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:46,349 INFO L482 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-05-21 20:32:46,349 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) [2021-05-21 20:32:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-05-21 20:32:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:46,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:46,367 INFO L521 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] [2021-05-21 20:32:46,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:46,568 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-05-21 20:32:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:46,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086614136] [2021-05-21 20:32:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:46,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:46,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086614136] [2021-05-21 20:32:46,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086614136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:46,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383622442] [2021-05-21 20:32:46,588 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 [2021-05-21 20:32:46,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:32:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:46,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:46,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383622442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:46,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:46,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:32:46,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465252346] [2021-05-21 20:32:46,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:46,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:46,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:46,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:46,654 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) [2021-05-21 20:32:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:46,956 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-05-21 20:32:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:32:46,956 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 [2021-05-21 20:32:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:47,021 INFO L225 Difference]: With dead ends: 51054 [2021-05-21 20:32:47,021 INFO L226 Difference]: Without dead ends: 51050 [2021-05-21 20:32:47,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:32:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-05-21 20:32:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-05-21 20:32:47,751 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) [2021-05-21 20:32:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-05-21 20:32:47,837 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-05-21 20:32:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:47,837 INFO L482 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-05-21 20:32:47,837 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) [2021-05-21 20:32:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-05-21 20:32:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:47,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:47,855 INFO L521 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] [2021-05-21 20:32:48,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:48,055 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-05-21 20:32:48,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:48,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057543873] [2021-05-21 20:32:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:48,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:48,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057543873] [2021-05-21 20:32:48,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057543873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:48,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325742657] [2021-05-21 20:32:48,074 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 [2021-05-21 20:32:48,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:32:48,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:48,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:48,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325742657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:48,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:48,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:32:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558429255] [2021-05-21 20:32:48,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:32:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:32:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:32:48,134 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) [2021-05-21 20:32:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:48,311 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-05-21 20:32:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:48,312 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 [2021-05-21 20:32:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:48,525 INFO L225 Difference]: With dead ends: 52488 [2021-05-21 20:32:48,525 INFO L226 Difference]: Without dead ends: 52485 [2021-05-21 20:32:48,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:32:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-05-21 20:32:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-05-21 20:32:49,121 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) [2021-05-21 20:32:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-05-21 20:32:49,203 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-05-21 20:32:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:49,203 INFO L482 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-05-21 20:32:49,203 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) [2021-05-21 20:32:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-05-21 20:32:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:49,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:49,220 INFO L521 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] [2021-05-21 20:32:49,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:32:49,421 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-05-21 20:32:49,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:49,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189627578] [2021-05-21 20:32:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:49,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:49,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189627578] [2021-05-21 20:32:49,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189627578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:49,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846002508] [2021-05-21 20:32:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:32:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:32:49,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846002508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:49,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:49,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 20:32:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888805033] [2021-05-21 20:32:49,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:32:49,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:49,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:32:49,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:32:49,505 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) [2021-05-21 20:32:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:49,823 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-05-21 20:32:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:32:49,823 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 [2021-05-21 20:32:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:49,891 INFO L225 Difference]: With dead ends: 52380 [2021-05-21 20:32:49,891 INFO L226 Difference]: Without dead ends: 52368 [2021-05-21 20:32:49,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:32:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-05-21 20:32:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-05-21 20:32:50,599 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) [2021-05-21 20:32:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-05-21 20:32:50,681 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-05-21 20:32:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:50,681 INFO L482 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-05-21 20:32:50,681 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) [2021-05-21 20:32:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-05-21 20:32:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 20:32:50,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:50,698 INFO L521 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] [2021-05-21 20:32:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 20:32:50,899 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-05-21 20:32:50,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:50,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627074372] [2021-05-21 20:32:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:50,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:50,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627074372] [2021-05-21 20:32:50,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627074372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:50,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952655766] [2021-05-21 20:32:50,922 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 [2021-05-21 20:32:50,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:32:50,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:32:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:32:50,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952655766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:50,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:50,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:32:50,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270425748] [2021-05-21 20:32:50,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:32:50,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:32:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:32:50,987 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) [2021-05-21 20:32:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:51,323 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-05-21 20:32:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:32:51,323 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 [2021-05-21 20:32:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:51,381 INFO L225 Difference]: With dead ends: 51895 [2021-05-21 20:32:51,381 INFO L226 Difference]: Without dead ends: 51883 [2021-05-21 20:32:51,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:32:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-05-21 20:32:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-05-21 20:32:51,956 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) [2021-05-21 20:32:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-05-21 20:32:52,036 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-05-21 20:32:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-05-21 20:32:52,036 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) [2021-05-21 20:32:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-05-21 20:32:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 20:32:52,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:52,054 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:32:52,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 20:32:52,257 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-05-21 20:32:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:52,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942306613] [2021-05-21 20:32:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:32:52,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:52,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942306613] [2021-05-21 20:32:52,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942306613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:52,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010456952] [2021-05-21 20:32:52,336 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 [2021-05-21 20:32:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 20:32:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-21 20:32:52,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010456952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:52,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:52,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:32:52,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939583917] [2021-05-21 20:32:52,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:32:52,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:52,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:32:52,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:32:52,460 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) [2021-05-21 20:32:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:53,015 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-05-21 20:32:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:32:53,015 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 [2021-05-21 20:32:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:53,082 INFO L225 Difference]: With dead ends: 50941 [2021-05-21 20:32:53,082 INFO L226 Difference]: Without dead ends: 50818 [2021-05-21 20:32:53,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:32:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-05-21 20:32:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-05-21 20:32:53,797 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) [2021-05-21 20:32:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-05-21 20:32:53,879 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-05-21 20:32:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:53,879 INFO L482 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-05-21 20:32:53,879 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) [2021-05-21 20:32:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-05-21 20:32:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 20:32:53,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:53,898 INFO L521 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] [2021-05-21 20:32:54,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 20:32:54,098 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-05-21 20:32:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:54,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965925762] [2021-05-21 20:32:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:54,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:54,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965925762] [2021-05-21 20:32:54,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965925762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439173743] [2021-05-21 20:32:54,144 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 [2021-05-21 20:32:54,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:32:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:32:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:54,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439173743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:54,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:54,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-21 20:32:54,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763126798] [2021-05-21 20:32:54,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:32:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:32:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:32:54,260 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) [2021-05-21 20:32:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:54,574 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-05-21 20:32:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:32:54,574 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 [2021-05-21 20:32:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:54,644 INFO L225 Difference]: With dead ends: 54165 [2021-05-21 20:32:54,645 INFO L226 Difference]: Without dead ends: 54165 [2021-05-21 20:32:54,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:32:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-05-21 20:32:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-05-21 20:32:55,236 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) [2021-05-21 20:32:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-05-21 20:32:55,291 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-05-21 20:32:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-05-21 20:32:55,291 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) [2021-05-21 20:32:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-05-21 20:32:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 20:32:55,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:55,309 INFO L521 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] [2021-05-21 20:32:55,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-21 20:32:55,509 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-05-21 20:32:55,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:55,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888133235] [2021-05-21 20:32:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:55,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:55,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888133235] [2021-05-21 20:32:55,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888133235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:55,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390775535] [2021-05-21 20:32:55,549 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 [2021-05-21 20:32:55,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:32:55,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:32:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:32:55,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390775535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:55,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:55,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-21 20:32:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715979580] [2021-05-21 20:32:55,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 20:32:55,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 20:32:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:32:55,830 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) [2021-05-21 20:32:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:56,078 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-05-21 20:32:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:32:56,079 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 [2021-05-21 20:32:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:56,116 INFO L225 Difference]: With dead ends: 34622 [2021-05-21 20:32:56,117 INFO L226 Difference]: Without dead ends: 34550 [2021-05-21 20:32:56,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:32:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-05-21 20:32:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-05-21 20:32:56,424 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) [2021-05-21 20:32:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-05-21 20:32:56,628 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-05-21 20:32:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:56,628 INFO L482 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-05-21 20:32:56,628 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) [2021-05-21 20:32:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-05-21 20:32:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:32:56,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:56,643 INFO L521 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] [2021-05-21 20:32:56,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:32:56,843 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-05-21 20:32:56,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:56,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107619978] [2021-05-21 20:32:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:56,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:56,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107619978] [2021-05-21 20:32:56,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107619978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:56,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351627798] [2021-05-21 20:32:56,971 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 [2021-05-21 20:32:56,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:32:56,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:32:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:57,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351627798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:57,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:57,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-21 20:32:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601721217] [2021-05-21 20:32:57,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:32:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:32:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:32:57,204 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) [2021-05-21 20:32:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:57,928 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-05-21 20:32:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:32:57,928 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 [2021-05-21 20:32:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:57,964 INFO L225 Difference]: With dead ends: 33955 [2021-05-21 20:32:57,965 INFO L226 Difference]: Without dead ends: 33895 [2021-05-21 20:32:57,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:32:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-05-21 20:32:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-05-21 20:32:58,365 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) [2021-05-21 20:32:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-05-21 20:32:58,413 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-05-21 20:32:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:58,413 INFO L482 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-05-21 20:32:58,413 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) [2021-05-21 20:32:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-05-21 20:32:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:32:58,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:32:58,430 INFO L521 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] [2021-05-21 20:32:58,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 20:32:58,631 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:32:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:32:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-05-21 20:32:58,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:32:58,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411357512] [2021-05-21 20:32:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:32:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:32:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:32:58,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:32:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411357512] [2021-05-21 20:32:58,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411357512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902420563] [2021-05-21 20:32:58,748 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 [2021-05-21 20:32:58,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:32:58,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:32:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:32:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:32:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:32:58,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902420563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:32:58,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:32:58,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-21 20:32:58,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187933553] [2021-05-21 20:32:58,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:32:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:32:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:32:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:32:58,961 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) [2021-05-21 20:32:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:32:59,503 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-05-21 20:32:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:32:59,503 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 [2021-05-21 20:32:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:32:59,541 INFO L225 Difference]: With dead ends: 34237 [2021-05-21 20:32:59,541 INFO L226 Difference]: Without dead ends: 34177 [2021-05-21 20:32:59,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:32:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-05-21 20:32:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-05-21 20:32:59,940 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) [2021-05-21 20:32:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-05-21 20:32:59,988 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-05-21 20:32:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:32:59,988 INFO L482 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-05-21 20:32:59,988 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) [2021-05-21 20:32:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-05-21 20:33:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:00,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:00,004 INFO L521 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] [2021-05-21 20:33:00,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:00,206 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-05-21 20:33:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:00,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225145425] [2021-05-21 20:33:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:00,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:00,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225145425] [2021-05-21 20:33:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225145425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:00,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254684375] [2021-05-21 20:33:00,324 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 [2021-05-21 20:33:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:00,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254684375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:00,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:00,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-21 20:33:00,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858658894] [2021-05-21 20:33:00,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:00,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:00,524 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) [2021-05-21 20:33:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:01,171 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-05-21 20:33:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:33:01,172 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 [2021-05-21 20:33:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:01,207 INFO L225 Difference]: With dead ends: 35020 [2021-05-21 20:33:01,207 INFO L226 Difference]: Without dead ends: 34968 [2021-05-21 20:33:01,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-05-21 20:33:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-05-21 20:33:01,519 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) [2021-05-21 20:33:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-05-21 20:33:01,565 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-05-21 20:33:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:01,565 INFO L482 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-05-21 20:33:01,566 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) [2021-05-21 20:33:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-05-21 20:33:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:01,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:01,581 INFO L521 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] [2021-05-21 20:33:01,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:01,782 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-05-21 20:33:01,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:01,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090577192] [2021-05-21 20:33:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090577192] [2021-05-21 20:33:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090577192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544019026] [2021-05-21 20:33:01,894 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 [2021-05-21 20:33:01,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:01,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:01,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:02,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544019026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:02,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:02,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:02,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226604597] [2021-05-21 20:33:02,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:02,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:02,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:02,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:02,209 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) [2021-05-21 20:33:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:02,635 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-05-21 20:33:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:02,635 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 [2021-05-21 20:33:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:02,673 INFO L225 Difference]: With dead ends: 35348 [2021-05-21 20:33:02,673 INFO L226 Difference]: Without dead ends: 35287 [2021-05-21 20:33:02,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-05-21 20:33:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-05-21 20:33:02,999 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) [2021-05-21 20:33:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-05-21 20:33:03,185 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-05-21 20:33:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:03,185 INFO L482 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-05-21 20:33:03,186 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) [2021-05-21 20:33:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-05-21 20:33:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:03,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:03,202 INFO L521 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] [2021-05-21 20:33:03,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-05-21 20:33:03,403 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-05-21 20:33:03,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:03,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967567365] [2021-05-21 20:33:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:03,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:03,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967567365] [2021-05-21 20:33:03,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967567365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300153161] [2021-05-21 20:33:03,531 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 [2021-05-21 20:33:03,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:33:03,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300153161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:03,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:03,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:03,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642991383] [2021-05-21 20:33:03,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:03,775 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) [2021-05-21 20:33:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:04,441 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-05-21 20:33:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:33:04,442 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 [2021-05-21 20:33:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:04,484 INFO L225 Difference]: With dead ends: 37628 [2021-05-21 20:33:04,484 INFO L226 Difference]: Without dead ends: 37564 [2021-05-21 20:33:04,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-05-21 20:33:04,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-05-21 20:33:04,951 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) [2021-05-21 20:33:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-05-21 20:33:05,006 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-05-21 20:33:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,006 INFO L482 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-05-21 20:33:05,006 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) [2021-05-21 20:33:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-05-21 20:33:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:05,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,025 INFO L521 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] [2021-05-21 20:33:05,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:05,229 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-05-21 20:33:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605999929] [2021-05-21 20:33:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:05,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605999929] [2021-05-21 20:33:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605999929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450048587] [2021-05-21 20:33:05,349 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 [2021-05-21 20:33:05,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:05,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:05,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450048587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:05,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-21 20:33:05,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274214326] [2021-05-21 20:33:05,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:05,551 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) [2021-05-21 20:33:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,101 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-05-21 20:33:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:33:06,101 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 [2021-05-21 20:33:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,141 INFO L225 Difference]: With dead ends: 37468 [2021-05-21 20:33:06,142 INFO L226 Difference]: Without dead ends: 37424 [2021-05-21 20:33:06,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-05-21 20:33:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-05-21 20:33:06,569 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) [2021-05-21 20:33:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-05-21 20:33:06,622 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-05-21 20:33:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,622 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-05-21 20:33:06,622 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) [2021-05-21 20:33:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-05-21 20:33:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:06,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,640 INFO L521 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] [2021-05-21 20:33:06,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:06,840 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-05-21 20:33:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773191413] [2021-05-21 20:33:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:06,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773191413] [2021-05-21 20:33:06,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773191413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:06,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442134286] [2021-05-21 20:33:06,958 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 [2021-05-21 20:33:06,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:33:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442134286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:07,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-21 20:33:07,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902881069] [2021-05-21 20:33:07,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:07,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:07,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:07,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:07,175 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) [2021-05-21 20:33:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:07,902 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-05-21 20:33:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:33:07,903 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 [2021-05-21 20:33:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:07,945 INFO L225 Difference]: With dead ends: 37883 [2021-05-21 20:33:07,946 INFO L226 Difference]: Without dead ends: 37825 [2021-05-21 20:33:07,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:33:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-05-21 20:33:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-05-21 20:33:08,294 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) [2021-05-21 20:33:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-05-21 20:33:08,349 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-05-21 20:33:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:08,349 INFO L482 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-05-21 20:33:08,349 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) [2021-05-21 20:33:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-05-21 20:33:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:08,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:08,367 INFO L521 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] [2021-05-21 20:33:08,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 20:33:08,567 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-05-21 20:33:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:08,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269442223] [2021-05-21 20:33:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:08,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:08,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269442223] [2021-05-21 20:33:08,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269442223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673220299] [2021-05-21 20:33:08,683 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 [2021-05-21 20:33:08,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:33:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:08,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:09,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673220299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:09,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747965316] [2021-05-21 20:33:09,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:09,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:09,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:09,011 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) [2021-05-21 20:33:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:09,798 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-05-21 20:33:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:33:09,799 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 [2021-05-21 20:33:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:09,847 INFO L225 Difference]: With dead ends: 42560 [2021-05-21 20:33:09,847 INFO L226 Difference]: Without dead ends: 42505 [2021-05-21 20:33:09,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-05-21 20:33:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-05-21 20:33:10,335 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) [2021-05-21 20:33:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-05-21 20:33:10,400 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-05-21 20:33:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:10,400 INFO L482 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-05-21 20:33:10,400 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) [2021-05-21 20:33:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-05-21 20:33:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:10,420 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:10,420 INFO L521 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] [2021-05-21 20:33:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:10,620 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-05-21 20:33:10,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:10,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856620676] [2021-05-21 20:33:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:10,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:10,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856620676] [2021-05-21 20:33:10,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856620676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304475185] [2021-05-21 20:33:10,738 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 [2021-05-21 20:33:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:10,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304475185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:10,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066658522] [2021-05-21 20:33:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:10,956 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) [2021-05-21 20:33:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:11,408 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-05-21 20:33:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:11,408 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 [2021-05-21 20:33:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:11,453 INFO L225 Difference]: With dead ends: 42177 [2021-05-21 20:33:11,453 INFO L226 Difference]: Without dead ends: 42122 [2021-05-21 20:33:11,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:33:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-05-21 20:33:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-05-21 20:33:11,908 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) [2021-05-21 20:33:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-05-21 20:33:11,966 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-05-21 20:33:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:11,966 INFO L482 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-05-21 20:33:11,966 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) [2021-05-21 20:33:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-05-21 20:33:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:11,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:11,985 INFO L521 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] [2021-05-21 20:33:12,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:33:12,185 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-05-21 20:33:12,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:12,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290361478] [2021-05-21 20:33:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290361478] [2021-05-21 20:33:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290361478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176528380] [2021-05-21 20:33:12,301 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 [2021-05-21 20:33:12,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:12,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176528380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:12,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:12,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743195116] [2021-05-21 20:33:12,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:12,531 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) [2021-05-21 20:33:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:13,225 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-05-21 20:33:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:13,226 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 [2021-05-21 20:33:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:13,264 INFO L225 Difference]: With dead ends: 43200 [2021-05-21 20:33:13,265 INFO L226 Difference]: Without dead ends: 43139 [2021-05-21 20:33:13,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-05-21 20:33:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-05-21 20:33:13,642 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) [2021-05-21 20:33:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-05-21 20:33:13,703 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-05-21 20:33:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:13,703 INFO L482 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-05-21 20:33:13,703 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) [2021-05-21 20:33:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-05-21 20:33:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:13,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:13,722 INFO L521 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] [2021-05-21 20:33:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:13,929 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-05-21 20:33:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854350915] [2021-05-21 20:33:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:14,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854350915] [2021-05-21 20:33:14,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854350915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974794015] [2021-05-21 20:33:14,044 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 [2021-05-21 20:33:14,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:33:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974794015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:14,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:14,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754027358] [2021-05-21 20:33:14,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:14,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:14,447 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) [2021-05-21 20:33:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:15,200 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-05-21 20:33:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:33:15,201 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 [2021-05-21 20:33:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:15,247 INFO L225 Difference]: With dead ends: 43593 [2021-05-21 20:33:15,248 INFO L226 Difference]: Without dead ends: 43522 [2021-05-21 20:33:15,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:33:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-05-21 20:33:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-05-21 20:33:15,709 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) [2021-05-21 20:33:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-05-21 20:33:15,772 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-05-21 20:33:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:15,772 INFO L482 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-05-21 20:33:15,772 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) [2021-05-21 20:33:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-05-21 20:33:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:15,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:15,792 INFO L521 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] [2021-05-21 20:33:15,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 20:33:15,997 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-05-21 20:33:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979570239] [2021-05-21 20:33:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:16,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:16,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979570239] [2021-05-21 20:33:16,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979570239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189936505] [2021-05-21 20:33:16,110 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 [2021-05-21 20:33:16,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:16,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189936505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:16,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:16,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367465349] [2021-05-21 20:33:16,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:16,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:16,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:16,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:16,341 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) [2021-05-21 20:33:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:16,903 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-05-21 20:33:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:16,904 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 [2021-05-21 20:33:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:16,950 INFO L225 Difference]: With dead ends: 44838 [2021-05-21 20:33:16,950 INFO L226 Difference]: Without dead ends: 44755 [2021-05-21 20:33:16,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-05-21 20:33:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-05-21 20:33:17,510 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) [2021-05-21 20:33:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-05-21 20:33:17,571 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-05-21 20:33:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:17,571 INFO L482 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-05-21 20:33:17,571 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) [2021-05-21 20:33:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-05-21 20:33:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:17,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:17,592 INFO L521 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] [2021-05-21 20:33:17,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:17,792 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-05-21 20:33:17,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:17,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708946853] [2021-05-21 20:33:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:17,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708946853] [2021-05-21 20:33:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708946853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187378654] [2021-05-21 20:33:17,902 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 [2021-05-21 20:33:17,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 20:33:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187378654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:18,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:18,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907862409] [2021-05-21 20:33:18,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:18,145 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) [2021-05-21 20:33:18,476 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-21 20:33:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:18,768 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-05-21 20:33:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:18,768 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 [2021-05-21 20:33:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:18,817 INFO L225 Difference]: With dead ends: 45004 [2021-05-21 20:33:18,817 INFO L226 Difference]: Without dead ends: 44951 [2021-05-21 20:33:18,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-05-21 20:33:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-05-21 20:33:19,395 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) [2021-05-21 20:33:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-05-21 20:33:19,454 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-05-21 20:33:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-05-21 20:33:19,454 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) [2021-05-21 20:33:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-05-21 20:33:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:19,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:19,473 INFO L521 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] [2021-05-21 20:33:19,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 20:33:19,688 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-05-21 20:33:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:19,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314658659] [2021-05-21 20:33:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:19,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:19,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314658659] [2021-05-21 20:33:19,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314658659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:19,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496965695] [2021-05-21 20:33:19,819 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) [2021-05-21 20:33:19,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:33:19,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:19,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496965695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:20,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:20,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146585536] [2021-05-21 20:33:20,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:20,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:20,097 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) [2021-05-21 20:33:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:20,767 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-05-21 20:33:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:33:20,767 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 [2021-05-21 20:33:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:20,816 INFO L225 Difference]: With dead ends: 47479 [2021-05-21 20:33:20,816 INFO L226 Difference]: Without dead ends: 47408 [2021-05-21 20:33:20,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:33:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-05-21 20:33:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-05-21 20:33:21,335 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) [2021-05-21 20:33:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-05-21 20:33:21,397 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-05-21 20:33:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:21,397 INFO L482 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-05-21 20:33:21,397 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) [2021-05-21 20:33:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-05-21 20:33:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:21,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:21,418 INFO L521 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] [2021-05-21 20:33:21,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:21,618 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-05-21 20:33:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90772794] [2021-05-21 20:33:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:21,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90772794] [2021-05-21 20:33:21,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90772794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000138850] [2021-05-21 20:33:21,736 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 [2021-05-21 20:33:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000138850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-21 20:33:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835294404] [2021-05-21 20:33:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:21,953 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) [2021-05-21 20:33:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:22,574 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-05-21 20:33:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:33:22,574 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 [2021-05-21 20:33:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:22,621 INFO L225 Difference]: With dead ends: 44309 [2021-05-21 20:33:22,622 INFO L226 Difference]: Without dead ends: 44269 [2021-05-21 20:33:22,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:33:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-05-21 20:33:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-05-21 20:33:23,036 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) [2021-05-21 20:33:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-05-21 20:33:23,100 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-05-21 20:33:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:23,100 INFO L482 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-05-21 20:33:23,100 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) [2021-05-21 20:33:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-05-21 20:33:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:23,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:23,121 INFO L521 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] [2021-05-21 20:33:23,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:23,321 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-05-21 20:33:23,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:23,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326072693] [2021-05-21 20:33:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:23,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326072693] [2021-05-21 20:33:23,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326072693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633327592] [2021-05-21 20:33:23,559 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 [2021-05-21 20:33:23,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633327592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:23,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184848019] [2021-05-21 20:33:23,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:23,801 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) [2021-05-21 20:33:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:24,313 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-05-21 20:33:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:24,314 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 [2021-05-21 20:33:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:24,360 INFO L225 Difference]: With dead ends: 44985 [2021-05-21 20:33:24,360 INFO L226 Difference]: Without dead ends: 44934 [2021-05-21 20:33:24,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 525.0ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-05-21 20:33:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-05-21 20:33:24,875 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) [2021-05-21 20:33:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-05-21 20:33:24,946 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-05-21 20:33:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:24,946 INFO L482 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-05-21 20:33:24,947 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) [2021-05-21 20:33:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-05-21 20:33:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:24,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:24,969 INFO L521 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] [2021-05-21 20:33:25,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:25,169 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-05-21 20:33:25,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:25,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305906708] [2021-05-21 20:33:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:25,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305906708] [2021-05-21 20:33:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305906708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090087508] [2021-05-21 20:33:25,294 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 [2021-05-21 20:33:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:33:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090087508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:25,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:25,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708328428] [2021-05-21 20:33:25,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:25,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:25,526 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) [2021-05-21 20:33:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:26,380 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-05-21 20:33:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:33:26,380 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 [2021-05-21 20:33:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:26,540 INFO L225 Difference]: With dead ends: 49164 [2021-05-21 20:33:26,540 INFO L226 Difference]: Without dead ends: 49079 [2021-05-21 20:33:26,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-05-21 20:33:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-05-21 20:33:26,977 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) [2021-05-21 20:33:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-05-21 20:33:27,044 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-05-21 20:33:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:27,044 INFO L482 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-05-21 20:33:27,045 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) [2021-05-21 20:33:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-05-21 20:33:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:27,070 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:27,070 INFO L521 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] [2021-05-21 20:33:27,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 20:33:27,271 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-05-21 20:33:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:27,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860366429] [2021-05-21 20:33:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,510 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-21 20:33:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:27,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860366429] [2021-05-21 20:33:27,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860366429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298899668] [2021-05-21 20:33:27,522 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 [2021-05-21 20:33:27,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:27,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:27,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:27,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298899668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:27,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988215155] [2021-05-21 20:33:27,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:27,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:27,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:27,742 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) [2021-05-21 20:33:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:28,275 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-05-21 20:33:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:28,276 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 [2021-05-21 20:33:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:28,328 INFO L225 Difference]: With dead ends: 48735 [2021-05-21 20:33:28,328 INFO L226 Difference]: Without dead ends: 48700 [2021-05-21 20:33:28,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-05-21 20:33:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-05-21 20:33:28,839 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) [2021-05-21 20:33:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-05-21 20:33:28,907 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-05-21 20:33:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:28,907 INFO L482 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-05-21 20:33:28,907 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) [2021-05-21 20:33:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-05-21 20:33:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:28,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:28,932 INFO L521 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] [2021-05-21 20:33:29,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 20:33:29,133 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-05-21 20:33:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095967531] [2021-05-21 20:33:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:29,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:29,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095967531] [2021-05-21 20:33:29,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095967531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159240548] [2021-05-21 20:33:29,240 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 [2021-05-21 20:33:29,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:33:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:29,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159240548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:29,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-21 20:33:29,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478026977] [2021-05-21 20:33:29,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:29,453 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) [2021-05-21 20:33:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:29,992 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-05-21 20:33:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:29,993 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 [2021-05-21 20:33:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:30,052 INFO L225 Difference]: With dead ends: 51644 [2021-05-21 20:33:30,053 INFO L226 Difference]: Without dead ends: 51544 [2021-05-21 20:33:30,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:33:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-05-21 20:33:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-05-21 20:33:30,648 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) [2021-05-21 20:33:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-05-21 20:33:30,716 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-05-21 20:33:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:30,717 INFO L482 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-05-21 20:33:30,717 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) [2021-05-21 20:33:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-05-21 20:33:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:30,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:30,742 INFO L521 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] [2021-05-21 20:33:30,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 20:33:30,943 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-05-21 20:33:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:30,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492848850] [2021-05-21 20:33:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492848850] [2021-05-21 20:33:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492848850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030921076] [2021-05-21 20:33:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:31,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:33:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:31,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030921076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:31,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785419981] [2021-05-21 20:33:31,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:31,438 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) [2021-05-21 20:33:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:32,026 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-05-21 20:33:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:32,027 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 [2021-05-21 20:33:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:32,082 INFO L225 Difference]: With dead ends: 50673 [2021-05-21 20:33:32,083 INFO L226 Difference]: Without dead ends: 50620 [2021-05-21 20:33:32,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-05-21 20:33:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-05-21 20:33:32,666 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) [2021-05-21 20:33:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-05-21 20:33:32,745 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-05-21 20:33:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:32,745 INFO L482 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-05-21 20:33:32,746 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) [2021-05-21 20:33:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-05-21 20:33:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:32,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:32,772 INFO L521 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] [2021-05-21 20:33:32,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 20:33:32,973 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-05-21 20:33:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:32,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769566361] [2021-05-21 20:33:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:33,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769566361] [2021-05-21 20:33:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769566361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590272424] [2021-05-21 20:33:33,084 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 [2021-05-21 20:33:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:33,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590272424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:33,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903023889] [2021-05-21 20:33:33,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:33,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:33,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:33,304 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) [2021-05-21 20:33:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:33,846 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-05-21 20:33:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:33,847 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 [2021-05-21 20:33:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:33,908 INFO L225 Difference]: With dead ends: 50981 [2021-05-21 20:33:33,908 INFO L226 Difference]: Without dead ends: 50938 [2021-05-21 20:33:33,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-05-21 20:33:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-05-21 20:33:34,502 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) [2021-05-21 20:33:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-05-21 20:33:34,583 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-05-21 20:33:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:34,583 INFO L482 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-05-21 20:33:34,583 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) [2021-05-21 20:33:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-05-21 20:33:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:34,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:34,610 INFO L521 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] [2021-05-21 20:33:34,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-21 20:33:34,810 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-05-21 20:33:34,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:34,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251919947] [2021-05-21 20:33:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:34,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:34,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251919947] [2021-05-21 20:33:34,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251919947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74225223] [2021-05-21 20:33:34,927 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) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:34,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:35,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74225223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:35,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-21 20:33:35,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881779916] [2021-05-21 20:33:35,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:35,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:35,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:35,131 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 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) [2021-05-21 20:33:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:35,910 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-05-21 20:33:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:33:35,911 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 [2021-05-21 20:33:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:35,974 INFO L225 Difference]: With dead ends: 50602 [2021-05-21 20:33:35,974 INFO L226 Difference]: Without dead ends: 50562 [2021-05-21 20:33:35,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-05-21 20:33:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-05-21 20:33:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-05-21 20:33:36,693 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-05-21 20:33:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:36,693 INFO L482 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-05-21 20:33:36,693 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) [2021-05-21 20:33:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-05-21 20:33:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:36,720 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:36,720 INFO L521 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] [2021-05-21 20:33:36,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:36,920 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1444303521, now seen corresponding path program 129 times [2021-05-21 20:33:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:36,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343078484] [2021-05-21 20:33:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:37,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343078484] [2021-05-21 20:33:37,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343078484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064233306] [2021-05-21 20:33:37,028 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:37,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:33:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064233306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:37,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-21 20:33:37,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357287452] [2021-05-21 20:33:37,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:33:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:33:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:37,266 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-05-21 20:33:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:38,170 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-05-21 20:33:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:33:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 [2021-05-21 20:33:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:38,234 INFO L225 Difference]: With dead ends: 54084 [2021-05-21 20:33:38,234 INFO L226 Difference]: Without dead ends: 54013 [2021-05-21 20:33:38,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:33:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-05-21 20:33:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-05-21 20:33:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-05-21 20:33:38,950 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-05-21 20:33:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:38,950 INFO L482 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-05-21 20:33:38,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-05-21 20:33:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-05-21 20:33:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:38,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:38,981 INFO L521 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] [2021-05-21 20:33:39,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 20:33:39,182 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 29410071, now seen corresponding path program 130 times [2021-05-21 20:33:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:39,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878282066] [2021-05-21 20:33:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:39,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:39,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878282066] [2021-05-21 20:33:39,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878282066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967441835] [2021-05-21 20:33:39,419 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:39,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:39,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:33:39,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967441835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:39,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-21 20:33:39,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284642499] [2021-05-21 20:33:39,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:39,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:39,631 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-05-21 20:33:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:40,119 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-05-21 20:33:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:40,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 [2021-05-21 20:33:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:40,192 INFO L225 Difference]: With dead ends: 57178 [2021-05-21 20:33:40,192 INFO L226 Difference]: Without dead ends: 57113 [2021-05-21 20:33:40,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:33:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-05-21 20:33:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-05-21 20:33:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-05-21 20:33:40,955 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-05-21 20:33:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:40,955 INFO L482 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-05-21 20:33:40,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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) [2021-05-21 20:33:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-05-21 20:33:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:40,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:40,983 INFO L521 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] [2021-05-21 20:33:41,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:41,184 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1499834081, now seen corresponding path program 131 times [2021-05-21 20:33:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124014767] [2021-05-21 20:33:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124014767] [2021-05-21 20:33:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124014767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328476314] [2021-05-21 20:33:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:41,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:33:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328476314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:41,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746777534] [2021-05-21 20:33:41,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:41,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:41,529 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 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) [2021-05-21 20:33:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:42,316 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-05-21 20:33:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:42,316 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 [2021-05-21 20:33:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:42,371 INFO L225 Difference]: With dead ends: 54729 [2021-05-21 20:33:42,371 INFO L226 Difference]: Without dead ends: 54629 [2021-05-21 20:33:42,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:33:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-05-21 20:33:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-05-21 20:33:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-05-21 20:33:42,964 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-05-21 20:33:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:42,964 INFO L482 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-05-21 20:33:42,964 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) [2021-05-21 20:33:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-05-21 20:33:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:42,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:42,993 INFO L521 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] [2021-05-21 20:33:43,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,193 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:43,194 INFO L82 PathProgramCache]: Analyzing trace with hash -367050537, now seen corresponding path program 132 times [2021-05-21 20:33:43,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:43,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460328601] [2021-05-21 20:33:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460328601] [2021-05-21 20:33:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460328601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782260364] [2021-05-21 20:33:43,449 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:33:43,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:43,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782260364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:43,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-21 20:33:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128001168] [2021-05-21 20:33:43,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:43,651 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 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) [2021-05-21 20:33:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:44,140 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-05-21 20:33:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:33:44,140 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 [2021-05-21 20:33:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:44,208 INFO L225 Difference]: With dead ends: 56271 [2021-05-21 20:33:44,208 INFO L226 Difference]: Without dead ends: 56195 [2021-05-21 20:33:44,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:33:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-05-21 20:33:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-05-21 20:33:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-05-21 20:33:44,908 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-05-21 20:33:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:44,908 INFO L482 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-05-21 20:33:44,908 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) [2021-05-21 20:33:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-05-21 20:33:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:44,937 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:44,937 INFO L521 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] [2021-05-21 20:33:45,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:45,137 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash 835986527, now seen corresponding path program 133 times [2021-05-21 20:33:45,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:45,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24255544] [2021-05-21 20:33:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:45,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:45,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24255544] [2021-05-21 20:33:45,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24255544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899212234] [2021-05-21 20:33:45,238 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899212234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:45,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-05-21 20:33:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655719428] [2021-05-21 20:33:45,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:45,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:45,440 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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) [2021-05-21 20:33:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:45,841 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-05-21 20:33:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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 [2021-05-21 20:33:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:45,912 INFO L225 Difference]: With dead ends: 56394 [2021-05-21 20:33:45,912 INFO L226 Difference]: Without dead ends: 56355 [2021-05-21 20:33:45,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-05-21 20:33:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-05-21 20:33:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-05-21 20:33:46,745 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-05-21 20:33:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:46,745 INFO L482 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-05-21 20:33:46,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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) [2021-05-21 20:33:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-05-21 20:33:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:46,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:46,775 INFO L521 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] [2021-05-21 20:33:46,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:46,975 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:46,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1067721981, now seen corresponding path program 134 times [2021-05-21 20:33:46,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:46,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67034189] [2021-05-21 20:33:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:47,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:47,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67034189] [2021-05-21 20:33:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67034189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318368492] [2021-05-21 20:33:47,091 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:47,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:47,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318368492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:47,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540642783] [2021-05-21 20:33:47,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:47,515 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 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) [2021-05-21 20:33:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:48,091 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-05-21 20:33:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:48,091 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 [2021-05-21 20:33:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:48,159 INFO L225 Difference]: With dead ends: 57019 [2021-05-21 20:33:48,159 INFO L226 Difference]: Without dead ends: 56955 [2021-05-21 20:33:48,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:33:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-05-21 20:33:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-05-21 20:33:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-05-21 20:33:48,908 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-05-21 20:33:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:48,908 INFO L482 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-05-21 20:33:48,908 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) [2021-05-21 20:33:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-05-21 20:33:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:48,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:48,938 INFO L521 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] [2021-05-21 20:33:49,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 20:33:49,138 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash -171286659, now seen corresponding path program 135 times [2021-05-21 20:33:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:49,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618689109] [2021-05-21 20:33:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:49,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:49,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618689109] [2021-05-21 20:33:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618689109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145451670] [2021-05-21 20:33:49,240 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:33:49,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:49,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145451670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:49,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-21 20:33:49,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853714291] [2021-05-21 20:33:49,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 20:33:49,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 20:33:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:49,472 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 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) [2021-05-21 20:33:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:50,169 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-05-21 20:33:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:33:50,170 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 [2021-05-21 20:33:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:50,399 INFO L225 Difference]: With dead ends: 59486 [2021-05-21 20:33:50,399 INFO L226 Difference]: Without dead ends: 59421 [2021-05-21 20:33:50,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-05-21 20:33:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-05-21 20:33:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-05-21 20:33:51,018 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-05-21 20:33:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:51,018 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-05-21 20:33:51,018 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) [2021-05-21 20:33:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-05-21 20:33:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:51,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:51,047 INFO L521 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] [2021-05-21 20:33:51,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 20:33:51,252 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:51,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2020553339, now seen corresponding path program 136 times [2021-05-21 20:33:51,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:51,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30374128] [2021-05-21 20:33:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:51,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:51,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30374128] [2021-05-21 20:33:51,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30374128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254310263] [2021-05-21 20:33:51,525 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:51,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:51,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:33:51,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254310263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:51,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-21 20:33:51,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083014049] [2021-05-21 20:33:51,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:51,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:51,761 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 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) [2021-05-21 20:33:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:52,237 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-05-21 20:33:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 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 [2021-05-21 20:33:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:52,307 INFO L225 Difference]: With dead ends: 56537 [2021-05-21 20:33:52,307 INFO L226 Difference]: Without dead ends: 56480 [2021-05-21 20:33:52,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:33:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-05-21 20:33:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-05-21 20:33:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-05-21 20:33:53,058 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-05-21 20:33:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:53,058 INFO L482 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-05-21 20:33:53,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 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) [2021-05-21 20:33:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-05-21 20:33:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:53,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:53,089 INFO L521 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] [2021-05-21 20:33:53,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:33:53,289 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash 442232079, now seen corresponding path program 137 times [2021-05-21 20:33:53,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:53,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223915735] [2021-05-21 20:33:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:53,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:53,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223915735] [2021-05-21 20:33:53,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223915735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463351686] [2021-05-21 20:33:53,393 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:53,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:33:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:53,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:53,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463351686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:53,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-21 20:33:53,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121221553] [2021-05-21 20:33:53,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:33:53,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:33:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:33:53,602 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 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) [2021-05-21 20:33:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:54,074 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-05-21 20:33:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:33:54,074 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 [2021-05-21 20:33:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:54,140 INFO L225 Difference]: With dead ends: 56317 [2021-05-21 20:33:54,140 INFO L226 Difference]: Without dead ends: 56270 [2021-05-21 20:33:54,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-05-21 20:33:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-05-21 20:33:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-05-21 20:33:54,907 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-05-21 20:33:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:54,907 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-05-21 20:33:54,908 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) [2021-05-21 20:33:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-05-21 20:33:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:54,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:54,936 INFO L521 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] [2021-05-21 20:33:55,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 20:33:55,137 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1041263967, now seen corresponding path program 138 times [2021-05-21 20:33:55,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:55,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083863627] [2021-05-21 20:33:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:55,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:55,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083863627] [2021-05-21 20:33:55,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083863627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751657444] [2021-05-21 20:33:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:55,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:33:55,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:55,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751657444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:55,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-21 20:33:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871978559] [2021-05-21 20:33:55,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 20:33:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 20:33:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:55,671 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-05-21 20:33:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:56,592 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-05-21 20:33:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:33:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 [2021-05-21 20:33:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:56,664 INFO L225 Difference]: With dead ends: 61301 [2021-05-21 20:33:56,664 INFO L226 Difference]: Without dead ends: 61234 [2021-05-21 20:33:56,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 751.7ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:33:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-05-21 20:33:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-05-21 20:33:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-05-21 20:33:57,492 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-05-21 20:33:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:57,492 INFO L482 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-05-21 20:33:57,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-05-21 20:33:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-05-21 20:33:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 20:33:57,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:57,521 INFO L521 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] [2021-05-21 20:33:57,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-21 20:33:57,721 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash 863946971, now seen corresponding path program 139 times [2021-05-21 20:33:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:57,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561740964] [2021-05-21 20:33:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561740964] [2021-05-21 20:33:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561740964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927915457] [2021-05-21 20:33:57,833 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 20:33:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:33:58,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927915457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:58,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-21 20:33:58,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418773577] [2021-05-21 20:33:58,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:33:58,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:33:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:58,040 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 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) [2021-05-21 20:33:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:58,628 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-05-21 20:33:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:33:58,628 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 [2021-05-21 20:33:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:58,697 INFO L225 Difference]: With dead ends: 56362 [2021-05-21 20:33:58,698 INFO L226 Difference]: Without dead ends: 56322 [2021-05-21 20:33:58,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-05-21 20:33:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-05-21 20:33:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-05-21 20:33:59,442 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-05-21 20:33:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-05-21 20:33:59,442 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) [2021-05-21 20:33:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-05-21 20:33:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 20:33:59,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:59,470 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:59,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:59,671 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:59,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -395845787, now seen corresponding path program 8 times [2021-05-21 20:33:59,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:59,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203434694] [2021-05-21 20:33:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:59,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203434694] [2021-05-21 20:33:59,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203434694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572236726] [2021-05-21 20:33:59,737 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:59,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:59,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:59,962 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-21 20:33:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:59,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572236726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:59,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:59,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 20:33:59,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644222728] [2021-05-21 20:33:59,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:59,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:59,979 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-21 20:34:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:00,236 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-05-21 20:34:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:34:00,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 43 [2021-05-21 20:34:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:00,306 INFO L225 Difference]: With dead ends: 59240 [2021-05-21 20:34:00,307 INFO L226 Difference]: Without dead ends: 59240 [2021-05-21 20:34:00,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:34:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-05-21 20:34:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-05-21 20:34:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-05-21 20:34:01,129 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-05-21 20:34:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:01,129 INFO L482 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-05-21 20:34:01,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-21 20:34:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-05-21 20:34:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:01,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:01,160 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:01,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:01,361 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 624773514, now seen corresponding path program 140 times [2021-05-21 20:34:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851179872] [2021-05-21 20:34:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:01,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851179872] [2021-05-21 20:34:01,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851179872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571811772] [2021-05-21 20:34:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:01,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:01,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571811772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:01,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33650676] [2021-05-21 20:34:01,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:01,842 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:02,662 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-05-21 20:34:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:34:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:02,731 INFO L225 Difference]: With dead ends: 57581 [2021-05-21 20:34:02,732 INFO L226 Difference]: Without dead ends: 57564 [2021-05-21 20:34:02,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:34:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-05-21 20:34:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-05-21 20:34:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-05-21 20:34:03,633 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-05-21 20:34:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:03,633 INFO L482 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-05-21 20:34:03,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-05-21 20:34:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:03,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:03,665 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:03,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:03,865 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506898, now seen corresponding path program 141 times [2021-05-21 20:34:03,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:03,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106704931] [2021-05-21 20:34:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106704931] [2021-05-21 20:34:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106704931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141950682] [2021-05-21 20:34:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:04,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:34:04,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:04,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141950682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:04,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:34:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783456036] [2021-05-21 20:34:04,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:34:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:34:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:04,603 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:06,247 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-05-21 20:34:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:34:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:06,331 INFO L225 Difference]: With dead ends: 64602 [2021-05-21 20:34:06,331 INFO L226 Difference]: Without dead ends: 64568 [2021-05-21 20:34:06,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 987.3ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:34:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-05-21 20:34:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-05-21 20:34:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-05-21 20:34:07,149 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-05-21 20:34:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:07,149 INFO L482 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-05-21 20:34:07,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-05-21 20:34:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:07,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:07,182 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:07,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:07,382 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1948613002, now seen corresponding path program 142 times [2021-05-21 20:34:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:07,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276427490] [2021-05-21 20:34:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:07,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:07,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276427490] [2021-05-21 20:34:07,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276427490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296517751] [2021-05-21 20:34:07,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:07,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:07,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:07,781 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-21 20:34:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:07,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296517751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:07,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:07,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158497108] [2021-05-21 20:34:07,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:07,976 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:09,026 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-05-21 20:34:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:09,096 INFO L225 Difference]: With dead ends: 61117 [2021-05-21 20:34:09,097 INFO L226 Difference]: Without dead ends: 61100 [2021-05-21 20:34:09,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:34:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-05-21 20:34:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-05-21 20:34:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-05-21 20:34:09,888 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-05-21 20:34:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:09,888 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-05-21 20:34:09,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-05-21 20:34:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:09,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:09,921 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:10,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:10,121 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1247898286, now seen corresponding path program 143 times [2021-05-21 20:34:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:10,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104078689] [2021-05-21 20:34:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:10,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104078689] [2021-05-21 20:34:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104078689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788344036] [2021-05-21 20:34:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:10,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:34:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788344036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:10,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:34:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896436073] [2021-05-21 20:34:10,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:34:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:34:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:34:10,724 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:12,107 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-05-21 20:34:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 20:34:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:12,180 INFO L225 Difference]: With dead ends: 62141 [2021-05-21 20:34:12,180 INFO L226 Difference]: Without dead ends: 62124 [2021-05-21 20:34:12,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1024.6ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:34:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-05-21 20:34:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-05-21 20:34:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-05-21 20:34:12,998 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-05-21 20:34:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:12,998 INFO L482 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-05-21 20:34:12,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-05-21 20:34:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:13,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:13,036 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:13,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:13,251 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 632835722, now seen corresponding path program 144 times [2021-05-21 20:34:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401902756] [2021-05-21 20:34:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:13,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401902756] [2021-05-21 20:34:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401902756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259296857] [2021-05-21 20:34:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:13,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:34:13,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:13,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259296857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:13,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:13,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-21 20:34:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203155166] [2021-05-21 20:34:13,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:34:13,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:34:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:34:13,859 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:15,568 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-05-21 20:34:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 20:34:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:15,649 INFO L225 Difference]: With dead ends: 67577 [2021-05-21 20:34:15,649 INFO L226 Difference]: Without dead ends: 67543 [2021-05-21 20:34:15,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:34:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-05-21 20:34:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-05-21 20:34:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-05-21 20:34:16,508 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-05-21 20:34:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:16,508 INFO L482 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-05-21 20:34:16,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-05-21 20:34:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:16,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:16,541 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:16,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:16,741 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash 592118866, now seen corresponding path program 145 times [2021-05-21 20:34:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422344003] [2021-05-21 20:34:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:16,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422344003] [2021-05-21 20:34:16,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422344003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:16,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911642231] [2021-05-21 20:34:16,918 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911642231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:17,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:17,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:34:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319869445] [2021-05-21 20:34:17,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:34:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:34:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:34:17,240 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:17,888 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-21 20:34:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:18,197 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-05-21 20:34:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:34:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:18,274 INFO L225 Difference]: With dead ends: 64664 [2021-05-21 20:34:18,274 INFO L226 Difference]: Without dead ends: 64630 [2021-05-21 20:34:18,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:34:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-05-21 20:34:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-05-21 20:34:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-05-21 20:34:19,246 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-05-21 20:34:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:19,246 INFO L482 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-05-21 20:34:19,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-05-21 20:34:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:19,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:19,279 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 20:34:19,479 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 994599818, now seen corresponding path program 146 times [2021-05-21 20:34:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:19,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946926153] [2021-05-21 20:34:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946926153] [2021-05-21 20:34:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946926153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094269130] [2021-05-21 20:34:19,648 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:19,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:20,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094269130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:20,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:20,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:34:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371727067] [2021-05-21 20:34:20,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:34:20,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:34:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:34:20,027 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:20,864 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-05-21 20:34:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:34:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:21,151 INFO L225 Difference]: With dead ends: 65329 [2021-05-21 20:34:21,151 INFO L226 Difference]: Without dead ends: 65295 [2021-05-21 20:34:21,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:34:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-05-21 20:34:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-05-21 20:34:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-05-21 20:34:22,095 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-05-21 20:34:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:22,095 INFO L482 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-05-21 20:34:22,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-05-21 20:34:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:22,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:22,125 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:22,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:22,326 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash 314707794, now seen corresponding path program 147 times [2021-05-21 20:34:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:22,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328390153] [2021-05-21 20:34:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:22,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:22,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328390153] [2021-05-21 20:34:22,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328390153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485433681] [2021-05-21 20:34:22,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:22,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:34:22,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:22,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:22,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485433681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:22,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:34:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866105090] [2021-05-21 20:34:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:34:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:34:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:22,854 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:24,149 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-05-21 20:34:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:34:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:24,239 INFO L225 Difference]: With dead ends: 75604 [2021-05-21 20:34:24,240 INFO L226 Difference]: Without dead ends: 75535 [2021-05-21 20:34:24,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:34:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-05-21 20:34:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-05-21 20:34:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-05-21 20:34:25,345 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-05-21 20:34:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:25,345 INFO L482 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-05-21 20:34:25,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-05-21 20:34:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:25,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:25,382 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:25,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 20:34:25,582 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1595616440, now seen corresponding path program 148 times [2021-05-21 20:34:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837502615] [2021-05-21 20:34:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:25,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:25,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837502615] [2021-05-21 20:34:25,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837502615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313366055] [2021-05-21 20:34:25,767 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:25,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:25,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:26,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313366055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:26,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735116244] [2021-05-21 20:34:26,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:26,080 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:26,995 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-05-21 20:34:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:27,078 INFO L225 Difference]: With dead ends: 70952 [2021-05-21 20:34:27,078 INFO L226 Difference]: Without dead ends: 70935 [2021-05-21 20:34:27,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:34:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-05-21 20:34:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-05-21 20:34:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-05-21 20:34:28,046 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-05-21 20:34:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:28,046 INFO L482 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-05-21 20:34:28,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-05-21 20:34:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:28,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:28,269 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:28,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:28,469 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -839131036, now seen corresponding path program 149 times [2021-05-21 20:34:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:28,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255298434] [2021-05-21 20:34:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:28,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255298434] [2021-05-21 20:34:28,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255298434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000899738] [2021-05-21 20:34:28,666 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:28,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:34:28,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000899738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:34:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749812808] [2021-05-21 20:34:29,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:34:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:34:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:34:29,083 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:30,222 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-05-21 20:34:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:34:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:30,306 INFO L225 Difference]: With dead ends: 71720 [2021-05-21 20:34:30,306 INFO L226 Difference]: Without dead ends: 71703 [2021-05-21 20:34:30,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:34:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-05-21 20:34:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-05-21 20:34:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-05-21 20:34:31,226 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-05-21 20:34:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:31,226 INFO L482 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-05-21 20:34:31,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-05-21 20:34:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:31,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:31,407 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:31,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-21 20:34:31,607 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2116521804, now seen corresponding path program 150 times [2021-05-21 20:34:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:31,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912375256] [2021-05-21 20:34:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:31,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:31,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912375256] [2021-05-21 20:34:31,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912375256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294092867] [2021-05-21 20:34:31,820 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:31,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:34:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294092867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:32,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:32,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:34:32,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901431770] [2021-05-21 20:34:32,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:34:32,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:32,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:34:32,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:32,218 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:33,732 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-05-21 20:34:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:34:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:33,828 INFO L225 Difference]: With dead ends: 79207 [2021-05-21 20:34:33,828 INFO L226 Difference]: Without dead ends: 79173 [2021-05-21 20:34:33,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 888.2ms TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:34:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-05-21 20:34:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-05-21 20:34:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-05-21 20:34:34,997 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-05-21 20:34:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:34,997 INFO L482 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-05-21 20:34:34,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-05-21 20:34:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:35,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:35,035 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:35,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:35,235 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1018065796, now seen corresponding path program 151 times [2021-05-21 20:34:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21609916] [2021-05-21 20:34:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:35,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:35,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21609916] [2021-05-21 20:34:35,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21609916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506193372] [2021-05-21 20:34:35,422 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:35,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506193372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:35,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:35,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152749683] [2021-05-21 20:34:35,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:35,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:35,721 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:36,646 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-05-21 20:34:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:36,739 INFO L225 Difference]: With dead ends: 74738 [2021-05-21 20:34:36,739 INFO L226 Difference]: Without dead ends: 74721 [2021-05-21 20:34:36,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 686.2ms TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:34:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-05-21 20:34:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-05-21 20:34:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-05-21 20:34:38,006 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-05-21 20:34:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:38,006 INFO L482 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-05-21 20:34:38,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-05-21 20:34:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:38,040 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:38,040 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:38,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:38,240 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 862668212, now seen corresponding path program 152 times [2021-05-21 20:34:38,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:38,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272220341] [2021-05-21 20:34:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:38,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272220341] [2021-05-21 20:34:38,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272220341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472914870] [2021-05-21 20:34:38,441 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:38,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:38,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:38,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472914870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:38,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:38,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259750888] [2021-05-21 20:34:38,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:38,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:38,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:38,736 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:39,901 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-05-21 20:34:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:34:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:39,997 INFO L225 Difference]: With dead ends: 78636 [2021-05-21 20:34:39,997 INFO L226 Difference]: Without dead ends: 78602 [2021-05-21 20:34:39,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:34:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-05-21 20:34:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-05-21 20:34:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-05-21 20:34:41,200 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-05-21 20:34:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:41,201 INFO L482 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-05-21 20:34:41,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-05-21 20:34:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:41,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:41,231 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:41,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:41,432 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 821951356, now seen corresponding path program 153 times [2021-05-21 20:34:41,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:41,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288668478] [2021-05-21 20:34:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:41,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:41,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288668478] [2021-05-21 20:34:41,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288668478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197551113] [2021-05-21 20:34:41,596 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:41,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:34:41,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:41,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:41,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197551113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:41,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:34:41,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496972189] [2021-05-21 20:34:41,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:34:41,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:34:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:41,951 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:43,771 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-05-21 20:34:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:34:43,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:43,859 INFO L225 Difference]: With dead ends: 84081 [2021-05-21 20:34:43,859 INFO L226 Difference]: Without dead ends: 84034 [2021-05-21 20:34:43,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:34:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-05-21 20:34:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-05-21 20:34:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-05-21 20:34:44,927 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-05-21 20:34:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:44,927 INFO L482 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-05-21 20:34:44,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-05-21 20:34:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:44,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:44,963 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:45,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:45,164 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:45,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1224432308, now seen corresponding path program 154 times [2021-05-21 20:34:45,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:45,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190713218] [2021-05-21 20:34:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:45,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190713218] [2021-05-21 20:34:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190713218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381764482] [2021-05-21 20:34:45,355 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:45,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:45,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381764482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:34:45,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493081501] [2021-05-21 20:34:45,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:34:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:34:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:34:45,705 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:46,781 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-05-21 20:34:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:34:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:46,864 INFO L225 Difference]: With dead ends: 79146 [2021-05-21 20:34:46,864 INFO L226 Difference]: Without dead ends: 79112 [2021-05-21 20:34:46,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:34:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-05-21 20:34:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-05-21 20:34:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-05-21 20:34:47,939 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-05-21 20:34:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:47,939 INFO L482 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-05-21 20:34:47,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-05-21 20:34:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:47,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:47,976 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:48,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-05-21 20:34:48,177 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -722916894, now seen corresponding path program 155 times [2021-05-21 20:34:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:48,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320213104] [2021-05-21 20:34:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320213104] [2021-05-21 20:34:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320213104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279408533] [2021-05-21 20:34:48,344 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:48,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:34:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:34:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279408533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:48,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:34:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972805495] [2021-05-21 20:34:48,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:34:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:48,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:34:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:34:48,698 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:49,848 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-05-21 20:34:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:34:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:34:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:49,943 INFO L225 Difference]: With dead ends: 87645 [2021-05-21 20:34:49,943 INFO L226 Difference]: Without dead ends: 87602 [2021-05-21 20:34:49,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:34:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-05-21 20:34:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-05-21 20:34:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-05-21 20:34:51,073 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-05-21 20:34:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:51,073 INFO L482 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-05-21 20:34:51,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-05-21 20:34:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:51,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:51,109 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:51,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 20:34:51,310 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1402578930, now seen corresponding path program 156 times [2021-05-21 20:34:51,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:51,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348278132] [2021-05-21 20:34:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:51,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:51,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348278132] [2021-05-21 20:34:51,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348278132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310196645] [2021-05-21 20:34:51,478 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:51,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:34:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310196645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:51,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492367795] [2021-05-21 20:34:51,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:51,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:51,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:51,773 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:53,114 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-05-21 20:34:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:34:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:53,217 INFO L225 Difference]: With dead ends: 87816 [2021-05-21 20:34:53,217 INFO L226 Difference]: Without dead ends: 87799 [2021-05-21 20:34:53,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:34:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-05-21 20:34:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-05-21 20:34:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-05-21 20:34:54,360 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-05-21 20:34:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:54,361 INFO L482 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-05-21 20:34:54,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-05-21 20:34:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:54,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:54,400 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:54,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:54,600 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1044575176, now seen corresponding path program 157 times [2021-05-21 20:34:54,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:54,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450734499] [2021-05-21 20:34:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:54,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:54,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450734499] [2021-05-21 20:34:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450734499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:54,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915134033] [2021-05-21 20:34:54,771 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:55,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915134033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:55,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:55,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983662161] [2021-05-21 20:34:55,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:55,065 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:56,212 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-05-21 20:34:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:56,312 INFO L225 Difference]: With dead ends: 86430 [2021-05-21 20:34:56,312 INFO L226 Difference]: Without dead ends: 86413 [2021-05-21 20:34:56,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:34:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-05-21 20:34:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-05-21 20:34:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-05-21 20:34:57,476 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-05-21 20:34:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:57,476 INFO L482 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-05-21 20:34:57,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-05-21 20:34:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:34:57,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:57,513 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:57,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 20:34:57,713 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1825448930, now seen corresponding path program 158 times [2021-05-21 20:34:57,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:57,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455640374] [2021-05-21 20:34:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455640374] [2021-05-21 20:34:57,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455640374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379066579] [2021-05-21 20:34:57,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:57,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:57,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:34:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:58,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379066579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:58,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:58,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:34:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586817515] [2021-05-21 20:34:58,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:34:58,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:34:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:58,180 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:34:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:59,320 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-05-21 20:34:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:34:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:59,420 INFO L225 Difference]: With dead ends: 86926 [2021-05-21 20:34:59,420 INFO L226 Difference]: Without dead ends: 86909 [2021-05-21 20:34:59,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 656.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:34:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-05-21 20:35:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-05-21 20:35:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-05-21 20:35:00,565 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-05-21 20:35:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:00,565 INFO L482 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-05-21 20:35:00,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-05-21 20:35:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:00,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:00,602 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:00,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 20:35:00,803 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:00,803 INFO L82 PathProgramCache]: Analyzing trace with hash 144907922, now seen corresponding path program 159 times [2021-05-21 20:35:00,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:00,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651862551] [2021-05-21 20:35:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:00,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651862551] [2021-05-21 20:35:00,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651862551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391730421] [2021-05-21 20:35:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:00,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:35:00,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:00,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:01,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391730421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:01,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:01,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-21 20:35:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030359685] [2021-05-21 20:35:01,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:35:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:35:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:35:01,418 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:03,205 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-05-21 20:35:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 20:35:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:03,323 INFO L225 Difference]: With dead ends: 91083 [2021-05-21 20:35:03,323 INFO L226 Difference]: Without dead ends: 91049 [2021-05-21 20:35:03,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1073.5ms TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:35:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-05-21 20:35:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-05-21 20:35:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-05-21 20:35:04,585 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-05-21 20:35:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:04,585 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-05-21 20:35:04,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-05-21 20:35:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:04,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:04,624 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:04,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-21 20:35:04,824 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1243363930, now seen corresponding path program 160 times [2021-05-21 20:35:04,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:04,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227262398] [2021-05-21 20:35:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:05,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227262398] [2021-05-21 20:35:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227262398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213618775] [2021-05-21 20:35:05,213 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:05,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:05,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:05,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213618775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:05,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:05,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:35:05,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638651510] [2021-05-21 20:35:05,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:35:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:35:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:05,517 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:06,436 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-05-21 20:35:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:35:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:35:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:06,546 INFO L225 Difference]: With dead ends: 88810 [2021-05-21 20:35:06,547 INFO L226 Difference]: Without dead ends: 88793 [2021-05-21 20:35:06,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:35:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-05-21 20:35:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-05-21 20:35:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-05-21 20:35:07,755 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-05-21 20:35:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:07,756 INFO L482 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-05-21 20:35:07,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-05-21 20:35:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:07,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:07,962 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,177 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1170869358, now seen corresponding path program 161 times [2021-05-21 20:35:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276742686] [2021-05-21 20:35:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:08,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:08,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276742686] [2021-05-21 20:35:08,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276742686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:08,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322799279] [2021-05-21 20:35:08,349 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:08,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:08,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322799279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:08,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:08,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:35:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586819151] [2021-05-21 20:35:08,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:35:08,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:35:08,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:35:08,814 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:10,720 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-05-21 20:35:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:35:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:10,828 INFO L225 Difference]: With dead ends: 94594 [2021-05-21 20:35:10,828 INFO L226 Difference]: Without dead ends: 94560 [2021-05-21 20:35:10,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1159.5ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:35:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-05-21 20:35:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-05-21 20:35:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-05-21 20:35:11,964 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-05-21 20:35:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:11,964 INFO L482 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-05-21 20:35:11,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-05-21 20:35:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:12,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:12,005 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:12,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-21 20:35:12,205 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1211586214, now seen corresponding path program 162 times [2021-05-21 20:35:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:12,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206672187] [2021-05-21 20:35:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206672187] [2021-05-21 20:35:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206672187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745566004] [2021-05-21 20:35:12,376 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:12,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:35:12,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:12,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745566004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:12,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-21 20:35:12,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187184925] [2021-05-21 20:35:12,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:35:12,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:35:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:35:12,820 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:13,816 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-05-21 20:35:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:14,797 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-05-21 20:35:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:35:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:14,912 INFO L225 Difference]: With dead ends: 95030 [2021-05-21 20:35:14,912 INFO L226 Difference]: Without dead ends: 94996 [2021-05-21 20:35:14,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1453.9ms TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:35:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-05-21 20:35:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-05-21 20:35:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-05-21 20:35:16,164 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-05-21 20:35:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:16,164 INFO L482 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-05-21 20:35:16,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-05-21 20:35:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:16,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:16,204 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:16,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:16,404 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:16,404 INFO L82 PathProgramCache]: Analyzing trace with hash -809105262, now seen corresponding path program 163 times [2021-05-21 20:35:16,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:16,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56183223] [2021-05-21 20:35:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:16,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56183223] [2021-05-21 20:35:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56183223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476235487] [2021-05-21 20:35:16,576 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476235487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:35:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82195285] [2021-05-21 20:35:17,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:35:17,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:35:17,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:17,145 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:18,211 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-05-21 20:35:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:35:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:18,325 INFO L225 Difference]: With dead ends: 91387 [2021-05-21 20:35:18,325 INFO L226 Difference]: Without dead ends: 91353 [2021-05-21 20:35:18,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 717.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:35:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-05-21 20:35:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-05-21 20:35:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-05-21 20:35:19,560 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-05-21 20:35:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:19,560 INFO L482 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-05-21 20:35:19,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-05-21 20:35:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:19,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:19,757 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:19,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:19,965 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1488997286, now seen corresponding path program 164 times [2021-05-21 20:35:19,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:19,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266855795] [2021-05-21 20:35:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:20,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266855795] [2021-05-21 20:35:20,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266855795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296352091] [2021-05-21 20:35:20,144 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:20,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:20,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:35:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296352091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:20,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:20,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:35:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384355364] [2021-05-21 20:35:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:35:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:35:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:20,511 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:35:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:21,572 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-05-21 20:35:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:35:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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 44 [2021-05-21 20:35:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:21,688 INFO L225 Difference]: With dead ends: 96202 [2021-05-21 20:35:21,688 INFO L226 Difference]: Without dead ends: 96159 [2021-05-21 20:35:21,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 738.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:35:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-05-21 20:35:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-05-21 20:35:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-05-21 20:35:23,101 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-05-21 20:35:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:23,102 INFO L482 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-05-21 20:35:23,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:35:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-05-21 20:35:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:23,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:23,139 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:23,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:23,340 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash 858850796, now seen corresponding path program 165 times [2021-05-21 20:35:23,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:23,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610962391] [2021-05-21 20:35:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:23,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:23,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610962391] [2021-05-21 20:35:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610962391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504952568] [2021-05-21 20:35:23,533 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:23,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:35:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504952568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:23,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:23,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:35:23,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502382295] [2021-05-21 20:35:23,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:35:23,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:35:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:23,843 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:24,827 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-05-21 20:35:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:35:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:35:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:25,166 INFO L225 Difference]: With dead ends: 94378 [2021-05-21 20:35:25,167 INFO L226 Difference]: Without dead ends: 94361 [2021-05-21 20:35:25,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:35:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-05-21 20:35:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-05-21 20:35:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-05-21 20:35:26,375 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-05-21 20:35:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:26,375 INFO L482 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-05-21 20:35:26,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-05-21 20:35:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:26,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:26,415 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:26,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:26,615 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1216854550, now seen corresponding path program 166 times [2021-05-21 20:35:26,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:26,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229750861] [2021-05-21 20:35:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:26,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229750861] [2021-05-21 20:35:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229750861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:26,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787185525] [2021-05-21 20:35:26,788 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:26,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787185525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:27,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:35:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733112616] [2021-05-21 20:35:27,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:35:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:35:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:27,091 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:28,193 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-05-21 20:35:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:35:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:35:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:28,298 INFO L225 Difference]: With dead ends: 94858 [2021-05-21 20:35:28,299 INFO L226 Difference]: Without dead ends: 94841 [2021-05-21 20:35:28,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:35:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-05-21 20:35:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-05-21 20:35:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-05-21 20:35:29,542 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-05-21 20:35:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:29,542 INFO L482 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-05-21 20:35:29,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-05-21 20:35:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:29,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:29,582 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:29,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 20:35:29,782 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -208088640, now seen corresponding path program 167 times [2021-05-21 20:35:29,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:29,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086185296] [2021-05-21 20:35:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:29,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086185296] [2021-05-21 20:35:29,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086185296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844312624] [2021-05-21 20:35:29,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:29,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:35:29,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:30,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844312624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:30,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:30,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:35:30,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424920997] [2021-05-21 20:35:30,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:35:30,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:35:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:35:30,382 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:31,915 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-05-21 20:35:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:35:31,915 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:32,026 INFO L225 Difference]: With dead ends: 95875 [2021-05-21 20:35:32,026 INFO L226 Difference]: Without dead ends: 95858 [2021-05-21 20:35:32,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:35:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-05-21 20:35:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-05-21 20:35:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-05-21 20:35:33,318 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-05-21 20:35:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:33,318 INFO L482 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-05-21 20:35:33,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-05-21 20:35:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:33,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:33,360 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:33,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 20:35:33,560 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1703774524, now seen corresponding path program 168 times [2021-05-21 20:35:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:33,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301093837] [2021-05-21 20:35:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:33,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:33,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301093837] [2021-05-21 20:35:33,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301093837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:33,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171954072] [2021-05-21 20:35:33,733 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:33,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:35:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:34,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171954072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:34,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:34,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:35:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190917016] [2021-05-21 20:35:34,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:35:34,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:34,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:35:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:34,334 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:35,760 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-05-21 20:35:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:35:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:35,894 INFO L225 Difference]: With dead ends: 102468 [2021-05-21 20:35:35,894 INFO L226 Difference]: Without dead ends: 102434 [2021-05-21 20:35:35,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:35:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-05-21 20:35:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-05-21 20:35:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-05-21 20:35:37,532 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-05-21 20:35:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:37,532 INFO L482 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-05-21 20:35:37,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-05-21 20:35:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:37,574 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:37,574 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:37,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:35:37,775 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash -710458764, now seen corresponding path program 169 times [2021-05-21 20:35:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:37,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739414816] [2021-05-21 20:35:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:37,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:37,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739414816] [2021-05-21 20:35:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739414816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92581505] [2021-05-21 20:35:37,944 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:38,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92581505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:38,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:35:38,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754462366] [2021-05-21 20:35:38,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:35:38,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:35:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:35:38,238 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:39,380 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-05-21 20:35:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:35:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:35:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:39,500 INFO L225 Difference]: With dead ends: 98052 [2021-05-21 20:35:39,500 INFO L226 Difference]: Without dead ends: 98018 [2021-05-21 20:35:39,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:35:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-05-21 20:35:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-05-21 20:35:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-05-21 20:35:40,953 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-05-21 20:35:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:40,953 INFO L482 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-05-21 20:35:40,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:35:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-05-21 20:35:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:40,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:40,991 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:41,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:41,192 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash -751175620, now seen corresponding path program 170 times [2021-05-21 20:35:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:41,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810431346] [2021-05-21 20:35:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:41,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:41,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810431346] [2021-05-21 20:35:41,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810431346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:41,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141789422] [2021-05-21 20:35:41,357 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:41,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:41,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:41,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141789422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:41,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:41,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:35:41,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78735255] [2021-05-21 20:35:41,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:35:41,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:41,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:35:41,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:35:41,675 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:42,899 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-05-21 20:35:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:35:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:43,013 INFO L225 Difference]: With dead ends: 97953 [2021-05-21 20:35:43,013 INFO L226 Difference]: Without dead ends: 97919 [2021-05-21 20:35:43,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:35:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-05-21 20:35:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-05-21 20:35:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-05-21 20:35:44,320 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-05-21 20:35:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:44,320 INFO L482 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-05-21 20:35:44,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-05-21 20:35:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:44,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:44,362 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:44,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:44,563 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1028586692, now seen corresponding path program 171 times [2021-05-21 20:35:44,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:44,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881892300] [2021-05-21 20:35:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:44,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:44,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881892300] [2021-05-21 20:35:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881892300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:44,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802280382] [2021-05-21 20:35:44,731 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:44,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:35:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:45,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802280382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:45,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:45,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:35:45,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022217385] [2021-05-21 20:35:45,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:35:45,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:35:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:45,090 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:46,806 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-05-21 20:35:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:35:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:46,947 INFO L225 Difference]: With dead ends: 107624 [2021-05-21 20:35:46,947 INFO L226 Difference]: Without dead ends: 107555 [2021-05-21 20:35:46,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:35:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-05-21 20:35:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-05-21 20:35:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-05-21 20:35:48,466 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-05-21 20:35:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:48,466 INFO L482 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-05-21 20:35:48,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-05-21 20:35:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:48,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:48,810 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:49,025 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 938145336, now seen corresponding path program 172 times [2021-05-21 20:35:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:49,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554197302] [2021-05-21 20:35:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:49,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554197302] [2021-05-21 20:35:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554197302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:49,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294902101] [2021-05-21 20:35:49,193 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:49,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:49,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:35:49,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294902101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:49,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:49,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:35:49,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133117402] [2021-05-21 20:35:49,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:35:49,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:35:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:35:49,538 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:50,728 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-05-21 20:35:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:35:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:50,864 INFO L225 Difference]: With dead ends: 105337 [2021-05-21 20:35:50,864 INFO L226 Difference]: Without dead ends: 105303 [2021-05-21 20:35:50,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:35:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-05-21 20:35:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-05-21 20:35:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-05-21 20:35:52,475 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-05-21 20:35:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:52,475 INFO L482 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-05-21 20:35:52,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-05-21 20:35:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:52,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:52,519 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:52,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:52,720 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261390, now seen corresponding path program 173 times [2021-05-21 20:35:52,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:52,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992701122] [2021-05-21 20:35:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:52,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992701122] [2021-05-21 20:35:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992701122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:52,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886037294] [2021-05-21 20:35:52,889 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:52,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:35:52,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886037294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:53,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:53,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:35:53,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331522155] [2021-05-21 20:35:53,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:35:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:35:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:35:53,304 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:55,016 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-05-21 20:35:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:35:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:55,156 INFO L225 Difference]: With dead ends: 106385 [2021-05-21 20:35:55,156 INFO L226 Difference]: Without dead ends: 106368 [2021-05-21 20:35:55,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1193.8ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:35:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-05-21 20:35:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-05-21 20:35:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-05-21 20:35:56,609 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-05-21 20:35:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:56,609 INFO L482 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-05-21 20:35:56,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-05-21 20:35:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:35:56,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:56,649 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:56,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:56,850 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1040789202, now seen corresponding path program 174 times [2021-05-21 20:35:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:56,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107703529] [2021-05-21 20:35:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:57,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107703529] [2021-05-21 20:35:57,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107703529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640390936] [2021-05-21 20:35:57,019 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:57,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:35:57,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:35:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:57,413 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-21 20:35:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:35:57,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640390936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:57,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:57,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:35:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924268855] [2021-05-21 20:35:57,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:35:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:35:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:35:57,722 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:59,160 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-05-21 20:35:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:35:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:35:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:59,314 INFO L225 Difference]: With dead ends: 113434 [2021-05-21 20:35:59,314 INFO L226 Difference]: Without dead ends: 113400 [2021-05-21 20:35:59,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1168.6ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:35:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-05-21 20:36:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-05-21 20:36:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-05-21 20:36:01,012 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-05-21 20:36:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:01,012 INFO L482 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-05-21 20:36:01,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-05-21 20:36:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:01,053 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:01,053 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:01,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:01,253 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1000072346, now seen corresponding path program 175 times [2021-05-21 20:36:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:01,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364334233] [2021-05-21 20:36:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:01,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364334233] [2021-05-21 20:36:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364334233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489618641] [2021-05-21 20:36:01,422 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:01,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489618641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:01,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:36:01,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309900110] [2021-05-21 20:36:01,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:36:01,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:36:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:01,740 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:03,184 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-05-21 20:36:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:36:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:03,354 INFO L225 Difference]: With dead ends: 107947 [2021-05-21 20:36:03,354 INFO L226 Difference]: Without dead ends: 107913 [2021-05-21 20:36:03,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:36:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-05-21 20:36:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-05-21 20:36:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-05-21 20:36:04,823 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-05-21 20:36:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:04,823 INFO L482 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-05-21 20:36:04,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-05-21 20:36:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:04,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:04,866 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:05,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:05,066 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553298, now seen corresponding path program 176 times [2021-05-21 20:36:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908475554] [2021-05-21 20:36:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:05,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:05,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908475554] [2021-05-21 20:36:05,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908475554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:05,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072226796] [2021-05-21 20:36:05,233 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:05,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:05,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072226796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:05,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:05,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:36:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579590751] [2021-05-21 20:36:05,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:36:05,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:36:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:05,575 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:06,549 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-21 20:36:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:06,996 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-05-21 20:36:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:36:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:07,139 INFO L225 Difference]: With dead ends: 108285 [2021-05-21 20:36:07,139 INFO L226 Difference]: Without dead ends: 108251 [2021-05-21 20:36:07,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1009.3ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:36:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-05-21 20:36:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-05-21 20:36:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-05-21 20:36:08,655 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-05-21 20:36:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:08,655 INFO L482 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-05-21 20:36:08,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-05-21 20:36:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:08,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:08,698 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:08,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:08,898 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 402638746, now seen corresponding path program 177 times [2021-05-21 20:36:08,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:08,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684380708] [2021-05-21 20:36:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:09,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:09,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684380708] [2021-05-21 20:36:09,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684380708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:09,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178694903] [2021-05-21 20:36:09,067 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:09,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:36:09,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:09,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:09,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178694903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:09,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:09,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:36:09,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255351223] [2021-05-21 20:36:09,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:36:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:36:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:36:09,740 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:11,145 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-05-21 20:36:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:36:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:11,295 INFO L225 Difference]: With dead ends: 113083 [2021-05-21 20:36:11,295 INFO L226 Difference]: Without dead ends: 113048 [2021-05-21 20:36:11,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1156.7ms TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:36:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-05-21 20:36:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-05-21 20:36:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-05-21 20:36:12,965 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-05-21 20:36:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,965 INFO L482 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-05-21 20:36:12,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-05-21 20:36:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:13,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:13,006 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:13,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:13,206 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322538, now seen corresponding path program 178 times [2021-05-21 20:36:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:13,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815739501] [2021-05-21 20:36:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815739501] [2021-05-21 20:36:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815739501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656636948] [2021-05-21 20:36:13,374 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:13,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:13,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656636948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:13,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:36:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527890300] [2021-05-21 20:36:13,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:36:13,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:36:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:13,685 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2021-05-21 20:36:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:14,877 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-05-21 20:36:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:36:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 44 [2021-05-21 20:36:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:15,027 INFO L225 Difference]: With dead ends: 113021 [2021-05-21 20:36:15,027 INFO L226 Difference]: Without dead ends: 112978 [2021-05-21 20:36:15,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:36:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-05-21 20:36:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-05-21 20:36:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-05-21 20:36:16,556 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-05-21 20:36:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:16,556 INFO L482 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-05-21 20:36:16,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2021-05-21 20:36:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-05-21 20:36:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:16,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:16,600 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:16,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 20:36:16,800 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1543995358, now seen corresponding path program 179 times [2021-05-21 20:36:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:16,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417604004] [2021-05-21 20:36:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:16,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417604004] [2021-05-21 20:36:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417604004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795462897] [2021-05-21 20:36:16,966 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:16,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:36:16,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:16,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:16,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795462897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:17,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:36:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808734608] [2021-05-21 20:36:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:36:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:36:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:17,278 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:17,701 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-21 20:36:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:18,504 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-05-21 20:36:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:36:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:18,659 INFO L225 Difference]: With dead ends: 113524 [2021-05-21 20:36:18,659 INFO L226 Difference]: Without dead ends: 113481 [2021-05-21 20:36:18,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 937.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:36:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-05-21 20:36:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-05-21 20:36:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-05-21 20:36:20,512 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-05-21 20:36:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:20,512 INFO L482 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-05-21 20:36:20,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-05-21 20:36:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:20,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:20,549 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:20,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:20,765 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476310, now seen corresponding path program 180 times [2021-05-21 20:36:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:20,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124064250] [2021-05-21 20:36:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:20,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124064250] [2021-05-21 20:36:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124064250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201858077] [2021-05-21 20:36:20,931 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:20,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:36:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:21,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201858077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:21,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:36:21,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040348941] [2021-05-21 20:36:21,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:36:21,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:36:21,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:21,278 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:22,425 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-05-21 20:36:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:36:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:22,599 INFO L225 Difference]: With dead ends: 122596 [2021-05-21 20:36:22,599 INFO L226 Difference]: Without dead ends: 122544 [2021-05-21 20:36:22,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:36:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-05-21 20:36:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-05-21 20:36:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-05-21 20:36:24,364 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-05-21 20:36:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:24,364 INFO L482 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-05-21 20:36:24,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-05-21 20:36:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:24,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:24,408 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:24,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-05-21 20:36:24,613 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 220708932, now seen corresponding path program 181 times [2021-05-21 20:36:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852613281] [2021-05-21 20:36:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:24,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852613281] [2021-05-21 20:36:24,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852613281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792757551] [2021-05-21 20:36:24,784 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:25,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792757551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:25,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:25,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:36:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576656757] [2021-05-21 20:36:25,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:36:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:36:25,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:36:25,099 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:26,242 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-05-21 20:36:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:36:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:26,394 INFO L225 Difference]: With dead ends: 116567 [2021-05-21 20:36:26,394 INFO L226 Difference]: Without dead ends: 116541 [2021-05-21 20:36:26,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:36:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-05-21 20:36:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-05-21 20:36:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-05-21 20:36:28,043 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-05-21 20:36:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:28,043 INFO L482 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-05-21 20:36:28,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-05-21 20:36:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:28,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:28,087 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:28,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:28,297 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 623189884, now seen corresponding path program 182 times [2021-05-21 20:36:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335131043] [2021-05-21 20:36:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:28,697 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-21 20:36:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:28,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:28,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335131043] [2021-05-21 20:36:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335131043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:28,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124409504] [2021-05-21 20:36:28,811 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:28,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:28,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:29,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124409504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:29,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:29,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:36:29,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323540053] [2021-05-21 20:36:29,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:36:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:36:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:29,150 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:30,307 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-05-21 20:36:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:36:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:30,467 INFO L225 Difference]: With dead ends: 120186 [2021-05-21 20:36:30,468 INFO L226 Difference]: Without dead ends: 120151 [2021-05-21 20:36:30,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:36:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-05-21 20:36:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-05-21 20:36:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-05-21 20:36:32,239 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-05-21 20:36:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:32,239 INFO L482 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-05-21 20:36:32,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-05-21 20:36:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:32,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:32,282 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:32,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:32,482 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 538134874, now seen corresponding path program 183 times [2021-05-21 20:36:32,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:32,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59763833] [2021-05-21 20:36:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:32,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:32,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59763833] [2021-05-21 20:36:32,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59763833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:32,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965961106] [2021-05-21 20:36:32,652 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:36:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:33,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965961106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:33,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:33,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:36:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762008697] [2021-05-21 20:36:33,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:36:33,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:36:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:36:33,012 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:34,822 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-05-21 20:36:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:36:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:34,982 INFO L225 Difference]: With dead ends: 121717 [2021-05-21 20:36:34,982 INFO L226 Difference]: Without dead ends: 121674 [2021-05-21 20:36:34,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1045.8ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:36:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-05-21 20:36:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-05-21 20:36:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-05-21 20:36:36,920 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-05-21 20:36:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:36,920 INFO L482 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-05-21 20:36:36,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-05-21 20:36:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:36,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:36,961 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:37,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-21 20:36:37,161 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 300697604, now seen corresponding path program 184 times [2021-05-21 20:36:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:37,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863022349] [2021-05-21 20:36:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:37,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863022349] [2021-05-21 20:36:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863022349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728817050] [2021-05-21 20:36:37,330 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:37,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728817050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:37,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:37,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-05-21 20:36:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851832070] [2021-05-21 20:36:37,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:36:37,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:37,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:36:37,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:37,684 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-05-21 20:36:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:38,605 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-05-21 20:36:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:36:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 44 [2021-05-21 20:36:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:38,770 INFO L225 Difference]: With dead ends: 124683 [2021-05-21 20:36:38,770 INFO L226 Difference]: Without dead ends: 124640 [2021-05-21 20:36:38,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 625.4ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:36:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-05-21 20:36:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-05-21 20:36:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-05-21 20:36:40,588 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-05-21 20:36:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:40,588 INFO L482 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-05-21 20:36:40,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-05-21 20:36:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-05-21 20:36:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:40,633 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:40,634 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:40,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:40,834 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash 787269176, now seen corresponding path program 185 times [2021-05-21 20:36:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:40,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775543831] [2021-05-21 20:36:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:41,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775543831] [2021-05-21 20:36:41,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775543831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:41,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597027496] [2021-05-21 20:36:41,001 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:41,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:36:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:41,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597027496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:41,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:41,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:36:41,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809701281] [2021-05-21 20:36:41,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:36:41,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:41,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:36:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:41,294 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2021-05-21 20:36:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:42,631 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-05-21 20:36:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:36:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 44 [2021-05-21 20:36:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:42,795 INFO L225 Difference]: With dead ends: 124836 [2021-05-21 20:36:42,795 INFO L226 Difference]: Without dead ends: 124802 [2021-05-21 20:36:42,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:36:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-05-21 20:36:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-05-21 20:36:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-05-21 20:36:44,840 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-05-21 20:36:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:44,840 INFO L482 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-05-21 20:36:44,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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) [2021-05-21 20:36:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-05-21 20:36:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:44,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:44,890 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:45,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:45,090 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash -451380224, now seen corresponding path program 186 times [2021-05-21 20:36:45,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:45,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630754517] [2021-05-21 20:36:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:45,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630754517] [2021-05-21 20:36:45,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630754517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902302745] [2021-05-21 20:36:45,263 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:45,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:36:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:45,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902302745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:45,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:45,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-21 20:36:45,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385796000] [2021-05-21 20:36:45,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:36:45,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:45,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:36:45,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:36:45,696 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:47,659 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-05-21 20:36:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 20:36:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:47,836 INFO L225 Difference]: With dead ends: 131445 [2021-05-21 20:36:47,837 INFO L226 Difference]: Without dead ends: 131411 [2021-05-21 20:36:47,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:36:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-05-21 20:36:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-05-21 20:36:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-05-21 20:36:49,938 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-05-21 20:36:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-05-21 20:36:49,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-05-21 20:36:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:49,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:49,984 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:50,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:50,185 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:50,185 INFO L82 PathProgramCache]: Analyzing trace with hash -48899272, now seen corresponding path program 187 times [2021-05-21 20:36:50,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:50,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981230938] [2021-05-21 20:36:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:50,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981230938] [2021-05-21 20:36:50,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981230938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107511354] [2021-05-21 20:36:50,354 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107511354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:50,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:36:50,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700019107] [2021-05-21 20:36:50,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:36:50,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:36:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:50,699 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:51,762 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-05-21 20:36:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:36:51,762 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:36:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:52,215 INFO L225 Difference]: With dead ends: 127848 [2021-05-21 20:36:52,215 INFO L226 Difference]: Without dead ends: 127814 [2021-05-21 20:36:52,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:36:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-05-21 20:36:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-05-21 20:36:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-05-21 20:36:53,772 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-05-21 20:36:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:53,772 INFO L482 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-05-21 20:36:53,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-05-21 20:36:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:53,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:53,828 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:54,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-05-21 20:36:54,029 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash -728791296, now seen corresponding path program 188 times [2021-05-21 20:36:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:54,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790161878] [2021-05-21 20:36:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:54,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790161878] [2021-05-21 20:36:54,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790161878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42886693] [2021-05-21 20:36:54,218 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:54,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:54,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:54,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42886693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:54,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:36:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959133039] [2021-05-21 20:36:54,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:36:54,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:54,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:36:54,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:36:54,579 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:36:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:56,148 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-05-21 20:36:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:36:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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 44 [2021-05-21 20:36:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:56,331 INFO L225 Difference]: With dead ends: 135363 [2021-05-21 20:36:56,332 INFO L226 Difference]: Without dead ends: 135320 [2021-05-21 20:36:56,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 865.6ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:36:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-05-21 20:36:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-05-21 20:36:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-05-21 20:36:58,347 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-05-21 20:36:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:58,347 INFO L482 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-05-21 20:36:58,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:36:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-05-21 20:36:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:36:58,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:58,401 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:58,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 20:36:58,602 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash 475376078, now seen corresponding path program 189 times [2021-05-21 20:36:58,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:58,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102927276] [2021-05-21 20:36:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:58,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:58,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102927276] [2021-05-21 20:36:58,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102927276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:58,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320730993] [2021-05-21 20:36:58,779 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:58,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:36:58,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:58,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:36:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:59,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320730993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:59,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:59,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:36:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549910558] [2021-05-21 20:36:59,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:36:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:36:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:59,077 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:00,424 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-05-21 20:37:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:37:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:37:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:00,594 INFO L225 Difference]: With dead ends: 128874 [2021-05-21 20:37:00,594 INFO L226 Difference]: Without dead ends: 128840 [2021-05-21 20:37:00,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 690.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-05-21 20:37:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-05-21 20:37:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-05-21 20:37:02,651 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-05-21 20:37:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:02,651 INFO L482 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-05-21 20:37:02,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-05-21 20:37:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:02,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:02,697 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:02,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:02,897 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 434659222, now seen corresponding path program 190 times [2021-05-21 20:37:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:02,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848326916] [2021-05-21 20:37:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:03,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848326916] [2021-05-21 20:37:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848326916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131824614] [2021-05-21 20:37:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:03,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:03,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131824614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:03,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:03,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:37:03,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562116819] [2021-05-21 20:37:03,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:37:03,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:03,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:37:03,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:37:03,389 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:04,381 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-05-21 20:37:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:37:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:04,556 INFO L225 Difference]: With dead ends: 128806 [2021-05-21 20:37:04,557 INFO L226 Difference]: Without dead ends: 128772 [2021-05-21 20:37:04,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-05-21 20:37:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-05-21 20:37:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-05-21 20:37:06,419 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-05-21 20:37:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:06,420 INFO L482 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-05-21 20:37:06,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-05-21 20:37:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:06,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:06,479 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:06,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-21 20:37:06,680 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:06,680 INFO L82 PathProgramCache]: Analyzing trace with hash 837140174, now seen corresponding path program 191 times [2021-05-21 20:37:06,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:06,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949076403] [2021-05-21 20:37:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949076403] [2021-05-21 20:37:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949076403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285778352] [2021-05-21 20:37:06,848 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:06,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:37:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:07,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285778352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:07,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:07,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:37:07,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262097981] [2021-05-21 20:37:07,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:37:07,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:37:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:37:07,200 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:07,818 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-21 20:37:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:08,747 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-05-21 20:37:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:37:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:08,920 INFO L225 Difference]: With dead ends: 131900 [2021-05-21 20:37:08,920 INFO L226 Difference]: Without dead ends: 131866 [2021-05-21 20:37:08,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:37:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-05-21 20:37:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-05-21 20:37:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-05-21 20:37:11,136 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-05-21 20:37:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:11,136 INFO L482 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-05-21 20:37:11,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-05-21 20:37:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:11,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:11,194 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:11,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-21 20:37:11,409 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1110209028, now seen corresponding path program 192 times [2021-05-21 20:37:11,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:11,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016723884] [2021-05-21 20:37:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:11,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016723884] [2021-05-21 20:37:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016723884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871424711] [2021-05-21 20:37:11,609 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:11,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:37:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871424711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:12,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:37:12,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459942729] [2021-05-21 20:37:12,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:37:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:37:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:37:12,048 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:13,317 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-05-21 20:37:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:37:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:13,504 INFO L225 Difference]: With dead ends: 138710 [2021-05-21 20:37:13,504 INFO L226 Difference]: Without dead ends: 138667 [2021-05-21 20:37:13,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:37:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-05-21 20:37:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-05-21 20:37:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-05-21 20:37:15,477 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-05-21 20:37:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:15,477 INFO L482 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-05-21 20:37:15,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-05-21 20:37:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:15,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:15,535 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:15,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-21 20:37:15,735 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 796764494, now seen corresponding path program 193 times [2021-05-21 20:37:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:15,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077311640] [2021-05-21 20:37:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:15,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:15,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077311640] [2021-05-21 20:37:15,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077311640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:15,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007289994] [2021-05-21 20:37:15,905 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:16,276 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-21 20:37:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:16,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007289994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:16,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:16,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:37:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990174796] [2021-05-21 20:37:16,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:37:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:37:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:37:16,528 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:17,734 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-05-21 20:37:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:37:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:37:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:17,923 INFO L225 Difference]: With dead ends: 136993 [2021-05-21 20:37:17,923 INFO L226 Difference]: Without dead ends: 136959 [2021-05-21 20:37:17,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-05-21 20:37:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-05-21 20:37:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-05-21 20:37:19,958 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-05-21 20:37:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-05-21 20:37:19,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-05-21 20:37:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:20,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:20,015 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:20,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:20,216 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 756047638, now seen corresponding path program 194 times [2021-05-21 20:37:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:20,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932686815] [2021-05-21 20:37:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:20,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:20,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932686815] [2021-05-21 20:37:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932686815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:20,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201751868] [2021-05-21 20:37:20,393 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:20,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:20,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201751868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:20,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:20,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-21 20:37:20,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446017858] [2021-05-21 20:37:20,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 20:37:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 20:37:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:37:20,714 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:22,083 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-05-21 20:37:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:37:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:22,272 INFO L225 Difference]: With dead ends: 136923 [2021-05-21 20:37:22,273 INFO L226 Difference]: Without dead ends: 136889 [2021-05-21 20:37:22,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-05-21 20:37:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-05-21 20:37:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-05-21 20:37:24,465 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-05-21 20:37:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:24,466 INFO L482 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-05-21 20:37:24,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-05-21 20:37:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:24,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:24,524 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:24,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-21 20:37:24,725 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1158528590, now seen corresponding path program 195 times [2021-05-21 20:37:24,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:24,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776981752] [2021-05-21 20:37:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:24,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776981752] [2021-05-21 20:37:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776981752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52877366] [2021-05-21 20:37:24,893 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:24,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:37:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:25,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52877366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:25,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:25,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:37:25,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815999443] [2021-05-21 20:37:25,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:37:25,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:25,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:37:25,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:37:25,259 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:26,670 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-05-21 20:37:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:27,271 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-05-21 20:37:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:37:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:27,464 INFO L225 Difference]: With dead ends: 141699 [2021-05-21 20:37:27,464 INFO L226 Difference]: Without dead ends: 141665 [2021-05-21 20:37:27,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1145.3ms TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:37:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-05-21 20:37:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-05-21 20:37:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138137 states to 138137 states and 320460 transitions. [2021-05-21 20:37:29,585 INFO L78 Accepts]: Start accepts. Automaton has 138137 states and 320460 transitions. Word has length 44 [2021-05-21 20:37:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:29,585 INFO L482 AbstractCegarLoop]: Abstraction has 138137 states and 320460 transitions. [2021-05-21 20:37:29,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 138137 states and 320460 transitions. [2021-05-21 20:37:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:29,642 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:29,642 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:29,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:29,842 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -788820612, now seen corresponding path program 196 times [2021-05-21 20:37:29,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:29,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638245653] [2021-05-21 20:37:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:30,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638245653] [2021-05-21 20:37:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638245653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665546375] [2021-05-21 20:37:30,020 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:30,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:30,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:30,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665546375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:37:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907718977] [2021-05-21 20:37:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:37:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:37:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:37:30,379 INFO L87 Difference]: Start difference. First operand 138137 states and 320460 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:31,803 INFO L93 Difference]: Finished difference Result 147273 states and 341086 transitions. [2021-05-21 20:37:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:37:31,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:32,000 INFO L225 Difference]: With dead ends: 147273 [2021-05-21 20:37:32,000 INFO L226 Difference]: Without dead ends: 147230 [2021-05-21 20:37:32,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:37:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147230 states. [2021-05-21 20:37:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147230 to 144496. [2021-05-21 20:37:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 2.3211737430360913) internal successors, (335398), 144495 states have internal predecessors, (335398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 335398 transitions. [2021-05-21 20:37:34,290 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 335398 transitions. Word has length 44 [2021-05-21 20:37:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 144496 states and 335398 transitions. [2021-05-21 20:37:34,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 335398 transitions. [2021-05-21 20:37:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:34,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:34,350 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:34,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:34,551 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1468482648, now seen corresponding path program 197 times [2021-05-21 20:37:34,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:34,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4264204] [2021-05-21 20:37:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:34,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:34,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4264204] [2021-05-21 20:37:34,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4264204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192381299] [2021-05-21 20:37:34,721 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:34,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:37:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:34,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:35,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192381299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:35,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:35,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-21 20:37:35,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055349974] [2021-05-21 20:37:35,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:37:35,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:37:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:37:35,138 INFO L87 Difference]: Start difference. First operand 144496 states and 335398 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:37,003 INFO L93 Difference]: Finished difference Result 148037 states and 343015 transitions. [2021-05-21 20:37:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:37:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:37,202 INFO L225 Difference]: With dead ends: 148037 [2021-05-21 20:37:37,203 INFO L226 Difference]: Without dead ends: 148020 [2021-05-21 20:37:37,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 994.9ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:37:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148020 states. [2021-05-21 20:37:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148020 to 145235. [2021-05-21 20:37:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145235 states, 145234 states have (on average 2.321660217304488) internal successors, (337184), 145234 states have internal predecessors, (337184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145235 states to 145235 states and 337184 transitions. [2021-05-21 20:37:39,418 INFO L78 Accepts]: Start accepts. Automaton has 145235 states and 337184 transitions. Word has length 44 [2021-05-21 20:37:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:39,418 INFO L482 AbstractCegarLoop]: Abstraction has 145235 states and 337184 transitions. [2021-05-21 20:37:39,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 145235 states and 337184 transitions. [2021-05-21 20:37:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:39,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:39,479 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:39,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-05-21 20:37:39,680 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2050092680, now seen corresponding path program 198 times [2021-05-21 20:37:39,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:39,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369834561] [2021-05-21 20:37:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:39,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369834561] [2021-05-21 20:37:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369834561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122387816] [2021-05-21 20:37:39,853 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:39,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:37:39,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:40,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122387816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:40,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:40,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:37:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69750270] [2021-05-21 20:37:40,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:37:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:37:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:37:40,221 INFO L87 Difference]: Start difference. First operand 145235 states and 337184 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:42,478 INFO L93 Difference]: Finished difference Result 154165 states and 356569 transitions. [2021-05-21 20:37:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:37:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:42,679 INFO L225 Difference]: With dead ends: 154165 [2021-05-21 20:37:42,679 INFO L226 Difference]: Without dead ends: 154131 [2021-05-21 20:37:42,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:37:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154131 states. [2021-05-21 20:37:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154131 to 147119. [2021-05-21 20:37:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147119 states, 147118 states have (on average 2.3230128196413764) internal successors, (341757), 147118 states have internal predecessors, (341757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147119 states to 147119 states and 341757 transitions. [2021-05-21 20:37:44,900 INFO L78 Accepts]: Start accepts. Automaton has 147119 states and 341757 transitions. Word has length 44 [2021-05-21 20:37:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:44,900 INFO L482 AbstractCegarLoop]: Abstraction has 147119 states and 341757 transitions. [2021-05-21 20:37:44,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 147119 states and 341757 transitions. [2021-05-21 20:37:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:44,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:44,962 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:45,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:45,162 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -951636672, now seen corresponding path program 199 times [2021-05-21 20:37:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:45,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300856255] [2021-05-21 20:37:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:45,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300856255] [2021-05-21 20:37:45,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300856255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913967435] [2021-05-21 20:37:45,333 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913967435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:45,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:37:45,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628921521] [2021-05-21 20:37:45,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:37:45,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:37:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:37:45,630 INFO L87 Difference]: Start difference. First operand 147119 states and 341757 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:46,079 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-05-21 20:37:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:46,986 INFO L93 Difference]: Finished difference Result 147975 states and 343601 transitions. [2021-05-21 20:37:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:37:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:37:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:47,191 INFO L225 Difference]: With dead ends: 147975 [2021-05-21 20:37:47,191 INFO L226 Difference]: Without dead ends: 147958 [2021-05-21 20:37:47,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 937.8ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:37:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147958 states. [2021-05-21 20:37:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147958 to 147584. [2021-05-21 20:37:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147584 states, 147583 states have (on average 2.323268940189588) internal successors, (342875), 147583 states have internal predecessors, (342875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147584 states to 147584 states and 342875 transitions. [2021-05-21 20:37:49,440 INFO L78 Accepts]: Start accepts. Automaton has 147584 states and 342875 transitions. Word has length 44 [2021-05-21 20:37:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 147584 states and 342875 transitions. [2021-05-21 20:37:49,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 147584 states and 342875 transitions. [2021-05-21 20:37:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:49,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:49,498 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:49,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-21 20:37:49,698 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash 929097336, now seen corresponding path program 200 times [2021-05-21 20:37:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:49,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418640836] [2021-05-21 20:37:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:49,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:49,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418640836] [2021-05-21 20:37:49,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418640836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:49,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310663050] [2021-05-21 20:37:49,868 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:49,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:50,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310663050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:50,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:50,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:37:50,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761020833] [2021-05-21 20:37:50,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:37:50,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:37:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:37:50,168 INFO L87 Difference]: Start difference. First operand 147584 states and 342875 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:51,698 INFO L93 Difference]: Finished difference Result 148649 states and 345197 transitions. [2021-05-21 20:37:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:37:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:37:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:51,894 INFO L225 Difference]: With dead ends: 148649 [2021-05-21 20:37:51,895 INFO L226 Difference]: Without dead ends: 148615 [2021-05-21 20:37:51,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148615 states. [2021-05-21 20:37:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148615 to 148228. [2021-05-21 20:37:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148228 states, 148227 states have (on average 2.323483575866745) internal successors, (344403), 148227 states have internal predecessors, (344403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148228 states to 148228 states and 344403 transitions. [2021-05-21 20:37:54,126 INFO L78 Accepts]: Start accepts. Automaton has 148228 states and 344403 transitions. Word has length 44 [2021-05-21 20:37:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:54,126 INFO L482 AbstractCegarLoop]: Abstraction has 148228 states and 344403 transitions. [2021-05-21 20:37:54,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:37:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 148228 states and 344403 transitions. [2021-05-21 20:37:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:54,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:54,188 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:54,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-21 20:37:54,389 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 888380480, now seen corresponding path program 201 times [2021-05-21 20:37:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151669790] [2021-05-21 20:37:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:54,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151669790] [2021-05-21 20:37:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151669790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708327618] [2021-05-21 20:37:54,564 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:54,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:37:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:37:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:54,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708327618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:54,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:54,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:37:54,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205124479] [2021-05-21 20:37:54,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:37:54,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:54,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:37:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:37:54,933 INFO L87 Difference]: Start difference. First operand 148228 states and 344403 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:57,188 INFO L93 Difference]: Finished difference Result 153460 states and 355839 transitions. [2021-05-21 20:37:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:37:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:37:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:57,404 INFO L225 Difference]: With dead ends: 153460 [2021-05-21 20:37:57,404 INFO L226 Difference]: Without dead ends: 153426 [2021-05-21 20:37:57,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 913.5ms TimeCoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:37:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2021-05-21 20:37:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 149372. [2021-05-21 20:37:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149372 states, 149371 states have (on average 2.323878128954081) internal successors, (347120), 149371 states have internal predecessors, (347120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149372 states to 149372 states and 347120 transitions. [2021-05-21 20:37:59,575 INFO L78 Accepts]: Start accepts. Automaton has 149372 states and 347120 transitions. Word has length 44 [2021-05-21 20:37:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:59,575 INFO L482 AbstractCegarLoop]: Abstraction has 149372 states and 347120 transitions. [2021-05-21 20:37:59,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 149372 states and 347120 transitions. [2021-05-21 20:37:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:37:59,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:59,636 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:59,837 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1290861432, now seen corresponding path program 202 times [2021-05-21 20:37:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056194912] [2021-05-21 20:37:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:00,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056194912] [2021-05-21 20:38:00,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056194912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867805527] [2021-05-21 20:38:00,004 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:00,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:38:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:00,599 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-21 20:38:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:00,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867805527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:00,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:00,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-21 20:38:00,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371641601] [2021-05-21 20:38:00,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 20:38:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 20:38:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:38:00,724 INFO L87 Difference]: Start difference. First operand 149372 states and 347120 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:01,746 INFO L93 Difference]: Finished difference Result 149842 states and 348098 transitions. [2021-05-21 20:38:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:38:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:38:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:01,944 INFO L225 Difference]: With dead ends: 149842 [2021-05-21 20:38:01,944 INFO L226 Difference]: Without dead ends: 149808 [2021-05-21 20:38:01,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:38:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149808 states. [2021-05-21 20:38:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149808 to 149694. [2021-05-21 20:38:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149694 states, 149693 states have (on average 2.3235555436793973) internal successors, (347820), 149693 states have internal predecessors, (347820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149694 states to 149694 states and 347820 transitions. [2021-05-21 20:38:04,197 INFO L78 Accepts]: Start accepts. Automaton has 149694 states and 347820 transitions. Word has length 44 [2021-05-21 20:38:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:04,197 INFO L482 AbstractCegarLoop]: Abstraction has 149694 states and 347820 transitions. [2021-05-21 20:38:04,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 149694 states and 347820 transitions. [2021-05-21 20:38:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:38:04,260 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:04,260 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:04,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-21 20:38:04,460 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash 610969408, now seen corresponding path program 203 times [2021-05-21 20:38:04,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:04,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509344632] [2021-05-21 20:38:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:04,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:04,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509344632] [2021-05-21 20:38:04,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509344632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:04,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438330221] [2021-05-21 20:38:04,634 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:04,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:38:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:38:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438330221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:04,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:38:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132379178] [2021-05-21 20:38:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:38:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:38:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:38:04,991 INFO L87 Difference]: Start difference. First operand 149694 states and 347820 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:38:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:06,601 INFO L93 Difference]: Finished difference Result 154647 states and 358583 transitions. [2021-05-21 20:38:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:38:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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 44 [2021-05-21 20:38:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:06,808 INFO L225 Difference]: With dead ends: 154647 [2021-05-21 20:38:06,808 INFO L226 Difference]: Without dead ends: 154604 [2021-05-21 20:38:06,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1042.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:38:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154604 states. [2021-05-21 20:38:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154604 to 151953. [2021-05-21 20:38:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151953 states, 151952 states have (on average 2.3238456881120353) internal successors, (353113), 151952 states have internal predecessors, (353113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 353113 transitions. [2021-05-21 20:38:09,112 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 353113 transitions. Word has length 44 [2021-05-21 20:38:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:09,112 INFO L482 AbstractCegarLoop]: Abstraction has 151953 states and 353113 transitions. [2021-05-21 20:38:09,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-05-21 20:38:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 353113 transitions. [2021-05-21 20:38:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:38:09,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:09,172 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:09,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:09,373 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1336149806, now seen corresponding path program 204 times [2021-05-21 20:38:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:09,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73565729] [2021-05-21 20:38:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:09,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:09,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73565729] [2021-05-21 20:38:09,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73565729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:09,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16914214] [2021-05-21 20:38:09,547 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:09,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:38:09,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:38:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:09,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16914214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:09,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:09,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-21 20:38:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407424245] [2021-05-21 20:38:09,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 20:38:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 20:38:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:38:09,912 INFO L87 Difference]: Start difference. First operand 151953 states and 353113 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:12,178 INFO L93 Difference]: Finished difference Result 162794 states and 376829 transitions. [2021-05-21 20:38:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:38:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-21 20:38:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:12,412 INFO L225 Difference]: With dead ends: 162794 [2021-05-21 20:38:12,412 INFO L226 Difference]: Without dead ends: 162760 [2021-05-21 20:38:12,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 903.3ms TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:38:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162760 states. [2021-05-21 20:38:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162760 to 155259. [2021-05-21 20:38:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155259 states, 155258 states have (on average 2.325992863491736) internal successors, (361129), 155258 states have internal predecessors, (361129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155259 states to 155259 states and 361129 transitions. [2021-05-21 20:38:15,223 INFO L78 Accepts]: Start accepts. Automaton has 155259 states and 361129 transitions. Word has length 44 [2021-05-21 20:38:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:15,223 INFO L482 AbstractCegarLoop]: Abstraction has 155259 states and 361129 transitions. [2021-05-21 20:38:15,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 155259 states and 361129 transitions. [2021-05-21 20:38:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:38:15,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:15,321 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:15,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-21 20:38:15,536 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -978146052, now seen corresponding path program 205 times [2021-05-21 20:38:15,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:15,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332638106] [2021-05-21 20:38:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:15,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:15,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332638106] [2021-05-21 20:38:15,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332638106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:15,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960861504] [2021-05-21 20:38:15,710 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:38:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:16,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960861504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:16,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:16,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:38:16,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987815491] [2021-05-21 20:38:16,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:38:16,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:38:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:38:16,014 INFO L87 Difference]: Start difference. First operand 155259 states and 361129 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:38:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:17,361 INFO L93 Difference]: Finished difference Result 156045 states and 362832 transitions. [2021-05-21 20:38:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:38:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:38:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:17,591 INFO L225 Difference]: With dead ends: 156045 [2021-05-21 20:38:17,591 INFO L226 Difference]: Without dead ends: 156028 [2021-05-21 20:38:17,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:38:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156028 states. [2021-05-21 20:38:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156028 to 155729. [2021-05-21 20:38:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155729 states, 155728 states have (on average 2.3262290660639064) internal successors, (362259), 155728 states have internal predecessors, (362259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155729 states to 155729 states and 362259 transitions. [2021-05-21 20:38:20,037 INFO L78 Accepts]: Start accepts. Automaton has 155729 states and 362259 transitions. Word has length 44 [2021-05-21 20:38:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:20,037 INFO L482 AbstractCegarLoop]: Abstraction has 155729 states and 362259 transitions. [2021-05-21 20:38:20,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:38:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 155729 states and 362259 transitions. [2021-05-21 20:38:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-21 20:38:20,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:20,103 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:20,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:20,303 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1891878054, now seen corresponding path program 206 times [2021-05-21 20:38:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:20,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625772212] [2021-05-21 20:38:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:20,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:20,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625772212] [2021-05-21 20:38:20,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625772212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:20,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573012445] [2021-05-21 20:38:20,476 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:20,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 20:38:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:20,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573012445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:20,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:20,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-21 20:38:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034134452] [2021-05-21 20:38:20,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 20:38:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 20:38:20,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:38:20,777 INFO L87 Difference]: Start difference. First operand 155729 states and 362259 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:38:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:22,121 INFO L93 Difference]: Finished difference Result 156514 states and 363952 transitions. [2021-05-21 20:38:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:38:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 44 [2021-05-21 20:38:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:22,313 INFO L225 Difference]: With dead ends: 156514 [2021-05-21 20:38:22,313 INFO L226 Difference]: Without dead ends: 156497 [2021-05-21 20:38:22,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:38:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156497 states. [2021-05-21 20:38:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156497 to 156189. [2021-05-21 20:38:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156189 states, 156188 states have (on average 2.32645913898635) internal successors, (363365), 156188 states have internal predecessors, (363365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156189 states to 156189 states and 363365 transitions. [2021-05-21 20:38:24,725 INFO L78 Accepts]: Start accepts. Automaton has 156189 states and 363365 transitions. Word has length 44 [2021-05-21 20:38:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:24,725 INFO L482 AbstractCegarLoop]: Abstraction has 156189 states and 363365 transitions. [2021-05-21 20:38:24,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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) [2021-05-21 20:38:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 156189 states and 363365 transitions. [2021-05-21 20:38:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:24,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:24,794 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-21 20:38:24,995 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1728055526, now seen corresponding path program 207 times [2021-05-21 20:38:24,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:24,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260349160] [2021-05-21 20:38:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:25,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260349160] [2021-05-21 20:38:25,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260349160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640948362] [2021-05-21 20:38:25,019 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:25,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:38:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:25,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640948362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:25,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:25,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:25,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568145233] [2021-05-21 20:38:25,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:25,091 INFO L87 Difference]: Start difference. First operand 156189 states and 363365 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-05-21 20:38:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:25,549 INFO L93 Difference]: Finished difference Result 158663 states and 368214 transitions. [2021-05-21 20:38:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:38:25,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 45 [2021-05-21 20:38:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:25,772 INFO L225 Difference]: With dead ends: 158663 [2021-05-21 20:38:25,773 INFO L226 Difference]: Without dead ends: 158660 [2021-05-21 20:38:25,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158660 states. [2021-05-21 20:38:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158660 to 156670. [2021-05-21 20:38:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 2.3263951387958053) internal successors, (364474), 156669 states have internal predecessors, (364474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 364474 transitions. [2021-05-21 20:38:28,278 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 364474 transitions. Word has length 45 [2021-05-21 20:38:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:28,278 INFO L482 AbstractCegarLoop]: Abstraction has 156670 states and 364474 transitions. [2021-05-21 20:38:28,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-05-21 20:38:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 364474 transitions. [2021-05-21 20:38:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:28,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:28,341 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:28,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-05-21 20:38:28,542 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 673568842, now seen corresponding path program 208 times [2021-05-21 20:38:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:28,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840453038] [2021-05-21 20:38:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:28,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:28,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840453038] [2021-05-21 20:38:28,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840453038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:28,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573458822] [2021-05-21 20:38:28,579 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:28,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:28,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:38:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573458822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:28,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:28,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:28,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965483506] [2021-05-21 20:38:28,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:28,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:28,654 INFO L87 Difference]: Start difference. First operand 156670 states and 364474 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) [2021-05-21 20:38:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:29,542 INFO L93 Difference]: Finished difference Result 183701 states and 427253 transitions. [2021-05-21 20:38:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:29,543 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 45 [2021-05-21 20:38:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:29,800 INFO L225 Difference]: With dead ends: 183701 [2021-05-21 20:38:29,800 INFO L226 Difference]: Without dead ends: 183701 [2021-05-21 20:38:29,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:38:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183701 states. [2021-05-21 20:38:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183701 to 177881. [2021-05-21 20:38:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177881 states, 177880 states have (on average 2.3365639757139647) internal successors, (415628), 177880 states have internal predecessors, (415628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177881 states to 177881 states and 415628 transitions. [2021-05-21 20:38:32,560 INFO L78 Accepts]: Start accepts. Automaton has 177881 states and 415628 transitions. Word has length 45 [2021-05-21 20:38:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:32,560 INFO L482 AbstractCegarLoop]: Abstraction has 177881 states and 415628 transitions. [2021-05-21 20:38:32,560 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) [2021-05-21 20:38:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 177881 states and 415628 transitions. [2021-05-21 20:38:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:33,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:33,048 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:33,248 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1350623474, now seen corresponding path program 209 times [2021-05-21 20:38:33,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:33,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378306041] [2021-05-21 20:38:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:33,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:33,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378306041] [2021-05-21 20:38:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378306041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:33,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107091645] [2021-05-21 20:38:33,272 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:33,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:38:33,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:33,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:38:33,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107091645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:33,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:33,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21474052] [2021-05-21 20:38:33,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:33,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:33,341 INFO L87 Difference]: Start difference. First operand 177881 states and 415628 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) [2021-05-21 20:38:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:33,837 INFO L93 Difference]: Finished difference Result 180381 states and 420212 transitions. [2021-05-21 20:38:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:38:33,838 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 45 [2021-05-21 20:38:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:34,091 INFO L225 Difference]: With dead ends: 180381 [2021-05-21 20:38:34,091 INFO L226 Difference]: Without dead ends: 180357 [2021-05-21 20:38:34,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180357 states. [2021-05-21 20:38:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180357 to 177716. [2021-05-21 20:38:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3318965759783925) internal successors, (414413), 177715 states have internal predecessors, (414413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414413 transitions. [2021-05-21 20:38:36,953 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414413 transitions. Word has length 45 [2021-05-21 20:38:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:36,953 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414413 transitions. [2021-05-21 20:38:36,953 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) [2021-05-21 20:38:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414413 transitions. [2021-05-21 20:38:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:37,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:37,499 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:37,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-05-21 20:38:37,699 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash -286948982, now seen corresponding path program 210 times [2021-05-21 20:38:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898294336] [2021-05-21 20:38:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:37,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898294336] [2021-05-21 20:38:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898294336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324948960] [2021-05-21 20:38:37,727 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:37,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:38:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:37,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324948960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:37,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:37,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:38:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119543200] [2021-05-21 20:38:37,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:38:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:38:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:38:37,793 INFO L87 Difference]: Start difference. First operand 177716 states and 414413 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) [2021-05-21 20:38:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:38,313 INFO L93 Difference]: Finished difference Result 180087 states and 418773 transitions. [2021-05-21 20:38:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:38,314 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 45 [2021-05-21 20:38:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:38,578 INFO L225 Difference]: With dead ends: 180087 [2021-05-21 20:38:38,579 INFO L226 Difference]: Without dead ends: 180075 [2021-05-21 20:38:38,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180075 states. [2021-05-21 20:38:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180075 to 177716. [2021-05-21 20:38:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3297020510367723) internal successors, (414023), 177715 states have internal predecessors, (414023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414023 transitions. [2021-05-21 20:38:41,824 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414023 transitions. Word has length 45 [2021-05-21 20:38:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:41,824 INFO L482 AbstractCegarLoop]: Abstraction has 177716 states and 414023 transitions. [2021-05-21 20:38:41,824 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) [2021-05-21 20:38:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414023 transitions. [2021-05-21 20:38:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:41,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:41,885 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:42,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 20:38:42,085 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1882064834, now seen corresponding path program 211 times [2021-05-21 20:38:42,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:42,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280578596] [2021-05-21 20:38:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:42,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:42,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280578596] [2021-05-21 20:38:42,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280578596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:42,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778051351] [2021-05-21 20:38:42,109 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:38:42,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778051351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:42,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:42,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647595267] [2021-05-21 20:38:42,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:42,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:42,177 INFO L87 Difference]: Start difference. First operand 177716 states and 414023 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) [2021-05-21 20:38:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:42,670 INFO L93 Difference]: Finished difference Result 193419 states and 449644 transitions. [2021-05-21 20:38:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:42,671 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 45 [2021-05-21 20:38:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:42,930 INFO L225 Difference]: With dead ends: 193419 [2021-05-21 20:38:42,930 INFO L226 Difference]: Without dead ends: 193419 [2021-05-21 20:38:42,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:38:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193419 states. [2021-05-21 20:38:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193419 to 188453. [2021-05-21 20:38:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188453 states, 188452 states have (on average 2.3340532337146858) internal successors, (439857), 188452 states have internal predecessors, (439857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188453 states to 188453 states and 439857 transitions. [2021-05-21 20:38:46,311 INFO L78 Accepts]: Start accepts. Automaton has 188453 states and 439857 transitions. Word has length 45 [2021-05-21 20:38:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:46,312 INFO L482 AbstractCegarLoop]: Abstraction has 188453 states and 439857 transitions. [2021-05-21 20:38:46,312 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) [2021-05-21 20:38:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 188453 states and 439857 transitions. [2021-05-21 20:38:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:46,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:46,381 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:46,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:46,581 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1205010202, now seen corresponding path program 212 times [2021-05-21 20:38:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:46,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797343891] [2021-05-21 20:38:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:46,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:46,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797343891] [2021-05-21 20:38:46,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797343891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:46,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748172996] [2021-05-21 20:38:46,612 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:46,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:46,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:38:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748172996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:46,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:46,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807815463] [2021-05-21 20:38:46,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:46,678 INFO L87 Difference]: Start difference. First operand 188453 states and 439857 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) [2021-05-21 20:38:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:47,205 INFO L93 Difference]: Finished difference Result 191124 states and 444736 transitions. [2021-05-21 20:38:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:38:47,205 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 45 [2021-05-21 20:38:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:47,472 INFO L225 Difference]: With dead ends: 191124 [2021-05-21 20:38:47,472 INFO L226 Difference]: Without dead ends: 191109 [2021-05-21 20:38:47,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191109 states. [2021-05-21 20:38:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191109 to 188396. [2021-05-21 20:38:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188396 states, 188395 states have (on average 2.3323602006422677) internal successors, (439405), 188395 states have internal predecessors, (439405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188396 states to 188396 states and 439405 transitions. [2021-05-21 20:38:50,755 INFO L78 Accepts]: Start accepts. Automaton has 188396 states and 439405 transitions. Word has length 45 [2021-05-21 20:38:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:50,755 INFO L482 AbstractCegarLoop]: Abstraction has 188396 states and 439405 transitions. [2021-05-21 20:38:50,755 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) [2021-05-21 20:38:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 188396 states and 439405 transitions. [2021-05-21 20:38:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:50,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:50,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-21 20:38:51,021 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1452384638, now seen corresponding path program 213 times [2021-05-21 20:38:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270927423] [2021-05-21 20:38:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:51,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:51,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270927423] [2021-05-21 20:38:51,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270927423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:51,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152528339] [2021-05-21 20:38:51,049 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:51,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:38:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:38:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152528339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:51,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:51,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:38:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059348622] [2021-05-21 20:38:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:38:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:38:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:38:51,114 INFO L87 Difference]: Start difference. First operand 188396 states and 439405 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) [2021-05-21 20:38:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:52,111 INFO L93 Difference]: Finished difference Result 191049 states and 444257 transitions. [2021-05-21 20:38:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:52,111 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 45 [2021-05-21 20:38:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:52,360 INFO L225 Difference]: With dead ends: 191049 [2021-05-21 20:38:52,361 INFO L226 Difference]: Without dead ends: 191028 [2021-05-21 20:38:52,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191028 states. [2021-05-21 20:38:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191028 to 176453. [2021-05-21 20:38:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176453 states, 176452 states have (on average 2.3230793643597125) internal successors, (409912), 176452 states have internal predecessors, (409912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176453 states to 176453 states and 409912 transitions. [2021-05-21 20:38:55,204 INFO L78 Accepts]: Start accepts. Automaton has 176453 states and 409912 transitions. Word has length 45 [2021-05-21 20:38:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:55,204 INFO L482 AbstractCegarLoop]: Abstraction has 176453 states and 409912 transitions. [2021-05-21 20:38:55,204 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) [2021-05-21 20:38:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 176453 states and 409912 transitions. [2021-05-21 20:38:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:38:55,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:55,271 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:55,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-21 20:38:55,472 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash 397030818, now seen corresponding path program 214 times [2021-05-21 20:38:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:55,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721288020] [2021-05-21 20:38:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:55,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721288020] [2021-05-21 20:38:55,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721288020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913441281] [2021-05-21 20:38:55,505 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:55,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:55,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:55,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:55,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:55,960 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-05-21 20:38:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:38:55,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913441281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:55,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:55,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-21 20:38:55,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072380030] [2021-05-21 20:38:55,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:38:55,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:55,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:38:55,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:38:55,967 INFO L87 Difference]: Start difference. First operand 176453 states and 409912 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-05-21 20:38:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:56,539 INFO L93 Difference]: Finished difference Result 179004 states and 414579 transitions. [2021-05-21 20:38:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:38:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 45 [2021-05-21 20:38:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:56,797 INFO L225 Difference]: With dead ends: 179004 [2021-05-21 20:38:56,798 INFO L226 Difference]: Without dead ends: 178983 [2021-05-21 20:38:56,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:38:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178983 states. [2021-05-21 20:38:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178983 to 176468. [2021-05-21 20:38:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176468 states, 176467 states have (on average 2.322660894104847) internal successors, (409873), 176467 states have internal predecessors, (409873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176468 states to 176468 states and 409873 transitions. [2021-05-21 20:39:00,083 INFO L78 Accepts]: Start accepts. Automaton has 176468 states and 409873 transitions. Word has length 45 [2021-05-21 20:39:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:00,084 INFO L482 AbstractCegarLoop]: Abstraction has 176468 states and 409873 transitions. [2021-05-21 20:39:00,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-05-21 20:39:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 176468 states and 409873 transitions. [2021-05-21 20:39:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:00,151 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:00,151 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:00,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-21 20:39:00,361 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1822368822, now seen corresponding path program 215 times [2021-05-21 20:39:00,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:00,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216576381] [2021-05-21 20:39:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:00,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:00,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216576381] [2021-05-21 20:39:00,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216576381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310813435] [2021-05-21 20:39:00,392 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:00,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:39:00,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310813435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:00,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-21 20:39:00,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064040518] [2021-05-21 20:39:00,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:00,464 INFO L87 Difference]: Start difference. First operand 176468 states and 409873 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:00,977 INFO L93 Difference]: Finished difference Result 186893 states and 434659 transitions. [2021-05-21 20:39:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:01,224 INFO L225 Difference]: With dead ends: 186893 [2021-05-21 20:39:01,225 INFO L226 Difference]: Without dead ends: 186893 [2021-05-21 20:39:01,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186893 states. [2021-05-21 20:39:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186893 to 130293. [2021-05-21 20:39:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130293 states, 130292 states have (on average 2.282711141129156) internal successors, (297419), 130292 states have internal predecessors, (297419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130293 states to 130293 states and 297419 transitions. [2021-05-21 20:39:03,695 INFO L78 Accepts]: Start accepts. Automaton has 130293 states and 297419 transitions. Word has length 45 [2021-05-21 20:39:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:03,695 INFO L482 AbstractCegarLoop]: Abstraction has 130293 states and 297419 transitions. [2021-05-21 20:39:03,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 130293 states and 297419 transitions. [2021-05-21 20:39:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:03,755 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:03,755 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:03,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:03,955 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1440909834, now seen corresponding path program 216 times [2021-05-21 20:39:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:03,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166976329] [2021-05-21 20:39:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:03,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166976329] [2021-05-21 20:39:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166976329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139881377] [2021-05-21 20:39:03,981 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:04,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:39:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139881377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:04,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:04,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:39:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282085642] [2021-05-21 20:39:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:04,053 INFO L87 Difference]: Start difference. First operand 130293 states and 297419 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:04,840 INFO L93 Difference]: Finished difference Result 136987 states and 313402 transitions. [2021-05-21 20:39:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 45 [2021-05-21 20:39:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:05,010 INFO L225 Difference]: With dead ends: 136987 [2021-05-21 20:39:05,010 INFO L226 Difference]: Without dead ends: 136987 [2021-05-21 20:39:05,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:39:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136987 states. [2021-05-21 20:39:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136987 to 131004. [2021-05-21 20:39:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131004 states, 131003 states have (on average 2.2863369541155545) internal successors, (299517), 131003 states have internal predecessors, (299517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131004 states to 131004 states and 299517 transitions. [2021-05-21 20:39:07,127 INFO L78 Accepts]: Start accepts. Automaton has 131004 states and 299517 transitions. Word has length 45 [2021-05-21 20:39:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:07,127 INFO L482 AbstractCegarLoop]: Abstraction has 131004 states and 299517 transitions. [2021-05-21 20:39:07,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 131004 states and 299517 transitions. [2021-05-21 20:39:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:07,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:07,191 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:07,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-05-21 20:39:07,405 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash 120349642, now seen corresponding path program 217 times [2021-05-21 20:39:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:07,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461140102] [2021-05-21 20:39:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:07,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:07,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461140102] [2021-05-21 20:39:07,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461140102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809357154] [2021-05-21 20:39:07,428 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809357154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301245845] [2021-05-21 20:39:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:07,500 INFO L87 Difference]: Start difference. First operand 131004 states and 299517 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:07,898 INFO L93 Difference]: Finished difference Result 136350 states and 310930 transitions. [2021-05-21 20:39:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:08,081 INFO L225 Difference]: With dead ends: 136350 [2021-05-21 20:39:08,081 INFO L226 Difference]: Without dead ends: 136350 [2021-05-21 20:39:08,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:39:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136350 states. [2021-05-21 20:39:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136350 to 133513. [2021-05-21 20:39:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133513 states, 133512 states have (on average 2.2889178500808915) internal successors, (305598), 133512 states have internal predecessors, (305598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133513 states to 133513 states and 305598 transitions. [2021-05-21 20:39:10,281 INFO L78 Accepts]: Start accepts. Automaton has 133513 states and 305598 transitions. Word has length 45 [2021-05-21 20:39:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:10,282 INFO L482 AbstractCegarLoop]: Abstraction has 133513 states and 305598 transitions. [2021-05-21 20:39:10,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 133513 states and 305598 transitions. [2021-05-21 20:39:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:10,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:10,340 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:10,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-21 20:39:10,541 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 797404274, now seen corresponding path program 218 times [2021-05-21 20:39:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:10,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688478732] [2021-05-21 20:39:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:10,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:10,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688478732] [2021-05-21 20:39:10,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688478732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:10,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153317349] [2021-05-21 20:39:10,563 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:10,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153317349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:10,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:10,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:10,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420469034] [2021-05-21 20:39:10,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:10,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:10,630 INFO L87 Difference]: Start difference. First operand 133513 states and 305598 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:11,374 INFO L93 Difference]: Finished difference Result 136108 states and 310337 transitions. [2021-05-21 20:39:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:39:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:11,544 INFO L225 Difference]: With dead ends: 136108 [2021-05-21 20:39:11,544 INFO L226 Difference]: Without dead ends: 136105 [2021-05-21 20:39:11,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:39:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136105 states. [2021-05-21 20:39:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136105 to 133512. [2021-05-21 20:39:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2888451138857473) internal successors, (305586), 133511 states have internal predecessors, (305586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305586 transitions. [2021-05-21 20:39:13,766 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305586 transitions. Word has length 45 [2021-05-21 20:39:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:13,766 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305586 transitions. [2021-05-21 20:39:13,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305586 transitions. [2021-05-21 20:39:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:13,825 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:13,825 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:14,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:14,026 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -840168182, now seen corresponding path program 219 times [2021-05-21 20:39:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:14,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363693252] [2021-05-21 20:39:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:14,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:14,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363693252] [2021-05-21 20:39:14,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363693252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:14,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806186464] [2021-05-21 20:39:14,049 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:14,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:39:14,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806186464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:14,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:14,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:39:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647281739] [2021-05-21 20:39:14,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:14,123 INFO L87 Difference]: Start difference. First operand 133512 states and 305586 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:14,516 INFO L93 Difference]: Finished difference Result 136143 states and 310391 transitions. [2021-05-21 20:39:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:14,703 INFO L225 Difference]: With dead ends: 136143 [2021-05-21 20:39:14,703 INFO L226 Difference]: Without dead ends: 136131 [2021-05-21 20:39:14,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:39:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136131 states. [2021-05-21 20:39:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136131 to 133512. [2021-05-21 20:39:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2885380230842403) internal successors, (305545), 133511 states have internal predecessors, (305545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305545 transitions. [2021-05-21 20:39:16,904 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305545 transitions. Word has length 45 [2021-05-21 20:39:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:16,904 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305545 transitions. [2021-05-21 20:39:16,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305545 transitions. [2021-05-21 20:39:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:16,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:16,964 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:17,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:17,164 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1895522002, now seen corresponding path program 220 times [2021-05-21 20:39:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:17,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618680078] [2021-05-21 20:39:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:17,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618680078] [2021-05-21 20:39:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618680078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524580869] [2021-05-21 20:39:17,192 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:17,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524580869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:17,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 20:39:17,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077553397] [2021-05-21 20:39:17,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:17,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:17,263 INFO L87 Difference]: Start difference. First operand 133512 states and 305545 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:17,659 INFO L93 Difference]: Finished difference Result 136170 states and 310404 transitions. [2021-05-21 20:39:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:39:17,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:18,270 INFO L225 Difference]: With dead ends: 136170 [2021-05-21 20:39:18,270 INFO L226 Difference]: Without dead ends: 136149 [2021-05-21 20:39:18,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:39:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136149 states. [2021-05-21 20:39:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136149 to 133512. [2021-05-21 20:39:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2883582626150654) internal successors, (305521), 133511 states have internal predecessors, (305521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305521 transitions. [2021-05-21 20:39:20,160 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305521 transitions. Word has length 45 [2021-05-21 20:39:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:20,160 INFO L482 AbstractCegarLoop]: Abstraction has 133512 states and 305521 transitions. [2021-05-21 20:39:20,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305521 transitions. [2021-05-21 20:39:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 20:39:20,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:20,545 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:20,760 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1514400394, now seen corresponding path program 221 times [2021-05-21 20:39:20,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:20,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141734305] [2021-05-21 20:39:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:20,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:20,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141734305] [2021-05-21 20:39:20,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141734305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:20,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012795367] [2021-05-21 20:39:20,806 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:20,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:39:20,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:20,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012795367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:20,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:20,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 20:39:20,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499453484] [2021-05-21 20:39:20,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:20,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:20,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:20,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:20,877 INFO L87 Difference]: Start difference. First operand 133512 states and 305521 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:21,279 INFO L93 Difference]: Finished difference Result 136071 states and 310197 transitions. [2021-05-21 20:39:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:39:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 20:39:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:21,461 INFO L225 Difference]: With dead ends: 136071 [2021-05-21 20:39:21,461 INFO L226 Difference]: Without dead ends: 136039 [2021-05-21 20:39:21,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:39:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136039 states. [2021-05-21 20:39:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136039 to 133542. [2021-05-21 20:39:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133542 states, 133541 states have (on average 2.2882036228573996) internal successors, (305569), 133541 states have internal predecessors, (305569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133542 states to 133542 states and 305569 transitions. [2021-05-21 20:39:23,646 INFO L78 Accepts]: Start accepts. Automaton has 133542 states and 305569 transitions. Word has length 45 [2021-05-21 20:39:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:23,646 INFO L482 AbstractCegarLoop]: Abstraction has 133542 states and 305569 transitions. [2021-05-21 20:39:23,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 133542 states and 305569 transitions. [2021-05-21 20:39:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 20:39:23,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:23,713 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:23,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-05-21 20:39:23,913 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:23,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1961990775, now seen corresponding path program 9 times [2021-05-21 20:39:23,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:23,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527788737] [2021-05-21 20:39:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-21 20:39:24,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527788737] [2021-05-21 20:39:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527788737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545289005] [2021-05-21 20:39:24,001 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:24,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:39:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:24,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 20:39:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-21 20:39:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545289005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:24,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-05-21 20:39:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402825371] [2021-05-21 20:39:24,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 20:39:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 20:39:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:39:24,152 INFO L87 Difference]: Start difference. First operand 133542 states and 305569 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) 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) [2021-05-21 20:39:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:25,191 INFO L93 Difference]: Finished difference Result 133718 states and 305942 transitions. [2021-05-21 20:39:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) 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 47 [2021-05-21 20:39:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:25,376 INFO L225 Difference]: With dead ends: 133718 [2021-05-21 20:39:25,377 INFO L226 Difference]: Without dead ends: 133571 [2021-05-21 20:39:25,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:39:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133571 states. [2021-05-21 20:39:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133571 to 133557. [2021-05-21 20:39:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133557 states, 133556 states have (on average 2.2881712540058103) internal successors, (305599), 133556 states have internal predecessors, (305599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133557 states to 133557 states and 305599 transitions. [2021-05-21 20:39:27,139 INFO L78 Accepts]: Start accepts. Automaton has 133557 states and 305599 transitions. Word has length 47 [2021-05-21 20:39:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:27,139 INFO L482 AbstractCegarLoop]: Abstraction has 133557 states and 305599 transitions. [2021-05-21 20:39:27,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7777777777777777) 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) [2021-05-21 20:39:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 133557 states and 305599 transitions. [2021-05-21 20:39:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 20:39:27,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:27,205 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:27,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-21 20:39:27,406 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:27,406 INFO L82 PathProgramCache]: Analyzing trace with hash -440972218, now seen corresponding path program 222 times [2021-05-21 20:39:27,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:27,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731554148] [2021-05-21 20:39:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731554148] [2021-05-21 20:39:27,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731554148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353616095] [2021-05-21 20:39:27,832 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:27,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:39:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:39:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:27,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353616095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:27,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:27,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 20:39:27,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355387168] [2021-05-21 20:39:27,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:39:27,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:39:27,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:39:27,966 INFO L87 Difference]: Start difference. First operand 133557 states and 305599 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:28,520 INFO L93 Difference]: Finished difference Result 137787 states and 313724 transitions. [2021-05-21 20:39:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:39:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 20:39:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:28,703 INFO L225 Difference]: With dead ends: 137787 [2021-05-21 20:39:28,703 INFO L226 Difference]: Without dead ends: 137787 [2021-05-21 20:39:28,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:39:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137787 states. [2021-05-21 20:39:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137787 to 113111. [2021-05-21 20:39:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113111 states, 113110 states have (on average 2.262116523737954) internal successors, (255868), 113110 states have internal predecessors, (255868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113111 states to 113111 states and 255868 transitions. [2021-05-21 20:39:30,737 INFO L78 Accepts]: Start accepts. Automaton has 113111 states and 255868 transitions. Word has length 47 [2021-05-21 20:39:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:30,737 INFO L482 AbstractCegarLoop]: Abstraction has 113111 states and 255868 transitions. [2021-05-21 20:39:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 113111 states and 255868 transitions. [2021-05-21 20:39:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 20:39:30,794 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:30,795 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:30,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-21 20:39:30,995 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2005544178, now seen corresponding path program 223 times [2021-05-21 20:39:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073998386] [2021-05-21 20:39:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 35 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:31,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:31,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073998386] [2021-05-21 20:39:31,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073998386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:31,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606496579] [2021-05-21 20:39:31,046 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:39:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:31,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606496579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:31,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:31,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 20:39:31,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756174685] [2021-05-21 20:39:31,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:39:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:39:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:39:31,173 INFO L87 Difference]: Start difference. First operand 113111 states and 255868 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 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) [2021-05-21 20:39:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:31,731 INFO L93 Difference]: Finished difference Result 114950 states and 255694 transitions. [2021-05-21 20:39:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:39:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 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 47 [2021-05-21 20:39:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:31,870 INFO L225 Difference]: With dead ends: 114950 [2021-05-21 20:39:31,871 INFO L226 Difference]: Without dead ends: 114864 [2021-05-21 20:39:31,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:39:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114864 states. [2021-05-21 20:39:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114864 to 112248. [2021-05-21 20:39:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112248 states, 112247 states have (on average 2.195755788573414) internal successors, (246467), 112247 states have internal predecessors, (246467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112248 states to 112248 states and 246467 transitions. [2021-05-21 20:39:33,677 INFO L78 Accepts]: Start accepts. Automaton has 112248 states and 246467 transitions. Word has length 47 [2021-05-21 20:39:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:33,677 INFO L482 AbstractCegarLoop]: Abstraction has 112248 states and 246467 transitions. [2021-05-21 20:39:33,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 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) [2021-05-21 20:39:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 112248 states and 246467 transitions. [2021-05-21 20:39:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:33,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:33,746 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:33,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-21 20:39:33,946 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1614465931, now seen corresponding path program 224 times [2021-05-21 20:39:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:33,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171576923] [2021-05-21 20:39:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:33,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171576923] [2021-05-21 20:39:33,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171576923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:33,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941484432] [2021-05-21 20:39:33,985 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:34,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941484432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:34,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:34,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 20:39:34,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201025430] [2021-05-21 20:39:34,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:34,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:34,059 INFO L87 Difference]: Start difference. First operand 112248 states and 246467 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-05-21 20:39:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:34,420 INFO L93 Difference]: Finished difference Result 121028 states and 266884 transitions. [2021-05-21 20:39:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:39:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 49 [2021-05-21 20:39:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:34,579 INFO L225 Difference]: With dead ends: 121028 [2021-05-21 20:39:34,579 INFO L226 Difference]: Without dead ends: 120876 [2021-05-21 20:39:34,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:39:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120876 states. [2021-05-21 20:39:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120876 to 120076. [2021-05-21 20:39:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120076 states, 120075 states have (on average 2.2036477201748905) internal successors, (264603), 120075 states have internal predecessors, (264603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120076 states to 120076 states and 264603 transitions. [2021-05-21 20:39:36,547 INFO L78 Accepts]: Start accepts. Automaton has 120076 states and 264603 transitions. Word has length 49 [2021-05-21 20:39:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:36,547 INFO L482 AbstractCegarLoop]: Abstraction has 120076 states and 264603 transitions. [2021-05-21 20:39:36,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-05-21 20:39:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 120076 states and 264603 transitions. [2021-05-21 20:39:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:36,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:36,615 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:36,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-05-21 20:39:36,817 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1623825095, now seen corresponding path program 225 times [2021-05-21 20:39:36,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:36,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968946498] [2021-05-21 20:39:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:36,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:36,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968946498] [2021-05-21 20:39:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968946498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312907582] [2021-05-21 20:39:36,855 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:36,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:39:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312907582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:36,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:36,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:36,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746909459] [2021-05-21 20:39:36,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:36,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:36,928 INFO L87 Difference]: Start difference. First operand 120076 states and 264603 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 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) [2021-05-21 20:39:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:37,262 INFO L93 Difference]: Finished difference Result 120556 states and 265078 transitions. [2021-05-21 20:39:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:37,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 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 49 [2021-05-21 20:39:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:37,425 INFO L225 Difference]: With dead ends: 120556 [2021-05-21 20:39:37,425 INFO L226 Difference]: Without dead ends: 120556 [2021-05-21 20:39:37,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:39:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120556 states. [2021-05-21 20:39:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120556 to 108555. [2021-05-21 20:39:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108555 states, 108554 states have (on average 2.1871510953074047) internal successors, (237424), 108554 states have internal predecessors, (237424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108555 states to 108555 states and 237424 transitions. [2021-05-21 20:39:39,319 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 237424 transitions. Word has length 49 [2021-05-21 20:39:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:39,319 INFO L482 AbstractCegarLoop]: Abstraction has 108555 states and 237424 transitions. [2021-05-21 20:39:39,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 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) [2021-05-21 20:39:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 237424 transitions. [2021-05-21 20:39:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:39,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:39,386 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:39,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:39,587 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -983710975, now seen corresponding path program 226 times [2021-05-21 20:39:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:39,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37408542] [2021-05-21 20:39:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:39,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:39,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37408542] [2021-05-21 20:39:39,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37408542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:39,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48797211] [2021-05-21 20:39:39,609 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:39,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:39,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:39:39,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48797211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:39,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:39,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:39,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420124494] [2021-05-21 20:39:39,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:39,676 INFO L87 Difference]: Start difference. First operand 108555 states and 237424 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:39,996 INFO L93 Difference]: Finished difference Result 110417 states and 241176 transitions. [2021-05-21 20:39:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:39:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 49 [2021-05-21 20:39:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:40,141 INFO L225 Difference]: With dead ends: 110417 [2021-05-21 20:39:40,141 INFO L226 Difference]: Without dead ends: 110409 [2021-05-21 20:39:40,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:39:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110409 states. [2021-05-21 20:39:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110409 to 109477. [2021-05-21 20:39:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109477 states, 109476 states have (on average 2.187420073806131) internal successors, (239470), 109476 states have internal predecessors, (239470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109477 states to 109477 states and 239470 transitions. [2021-05-21 20:39:41,988 INFO L78 Accepts]: Start accepts. Automaton has 109477 states and 239470 transitions. Word has length 49 [2021-05-21 20:39:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:41,989 INFO L482 AbstractCegarLoop]: Abstraction has 109477 states and 239470 transitions. [2021-05-21 20:39:41,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 109477 states and 239470 transitions. [2021-05-21 20:39:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:42,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:42,055 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:42,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-21 20:39:42,255 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1389078715, now seen corresponding path program 227 times [2021-05-21 20:39:42,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:42,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399458692] [2021-05-21 20:39:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399458692] [2021-05-21 20:39:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399458692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288749591] [2021-05-21 20:39:42,277 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:42,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:39:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-21 20:39:42,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288749591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:42,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:42,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257407942] [2021-05-21 20:39:42,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:42,349 INFO L87 Difference]: Start difference. First operand 109477 states and 239470 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:42,667 INFO L93 Difference]: Finished difference Result 116103 states and 252486 transitions. [2021-05-21 20:39:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 49 [2021-05-21 20:39:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:42,811 INFO L225 Difference]: With dead ends: 116103 [2021-05-21 20:39:42,812 INFO L226 Difference]: Without dead ends: 116100 [2021-05-21 20:39:42,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:39:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116100 states. [2021-05-21 20:39:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116100 to 110735. [2021-05-21 20:39:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110735 states, 110734 states have (on average 2.1854714902378674) internal successors, (242006), 110734 states have internal predecessors, (242006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110735 states to 110735 states and 242006 transitions. [2021-05-21 20:39:44,710 INFO L78 Accepts]: Start accepts. Automaton has 110735 states and 242006 transitions. Word has length 49 [2021-05-21 20:39:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:44,710 INFO L482 AbstractCegarLoop]: Abstraction has 110735 states and 242006 transitions. [2021-05-21 20:39:44,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 110735 states and 242006 transitions. [2021-05-21 20:39:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:44,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:44,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:44,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:44,978 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash -923764673, now seen corresponding path program 228 times [2021-05-21 20:39:44,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:44,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436404801] [2021-05-21 20:39:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:45,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436404801] [2021-05-21 20:39:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436404801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623414879] [2021-05-21 20:39:45,004 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:45,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:39:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:45,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623414879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:45,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:45,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:39:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886780565] [2021-05-21 20:39:45,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:45,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:45,077 INFO L87 Difference]: Start difference. First operand 110735 states and 242006 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:45,401 INFO L93 Difference]: Finished difference Result 111907 states and 242798 transitions. [2021-05-21 20:39:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 49 [2021-05-21 20:39:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:45,545 INFO L225 Difference]: With dead ends: 111907 [2021-05-21 20:39:45,545 INFO L226 Difference]: Without dead ends: 111904 [2021-05-21 20:39:45,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:39:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111904 states. [2021-05-21 20:39:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111904 to 109531. [2021-05-21 20:39:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109531 states, 109530 states have (on average 2.175778325572902) internal successors, (238313), 109530 states have internal predecessors, (238313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109531 states to 109531 states and 238313 transitions. [2021-05-21 20:39:47,405 INFO L78 Accepts]: Start accepts. Automaton has 109531 states and 238313 transitions. Word has length 49 [2021-05-21 20:39:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:47,405 INFO L482 AbstractCegarLoop]: Abstraction has 109531 states and 238313 transitions. [2021-05-21 20:39:47,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 109531 states and 238313 transitions. [2021-05-21 20:39:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:47,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:47,475 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:47,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:47,676 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash 961595637, now seen corresponding path program 229 times [2021-05-21 20:39:47,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:47,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988948947] [2021-05-21 20:39:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:47,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:47,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988948947] [2021-05-21 20:39:47,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988948947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:47,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791188660] [2021-05-21 20:39:47,698 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:39:47,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791188660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:47,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:47,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:47,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537097656] [2021-05-21 20:39:47,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:47,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:47,767 INFO L87 Difference]: Start difference. First operand 109531 states and 238313 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:48,093 INFO L93 Difference]: Finished difference Result 111152 states and 241442 transitions. [2021-05-21 20:39:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:39:48,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 49 [2021-05-21 20:39:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:48,236 INFO L225 Difference]: With dead ends: 111152 [2021-05-21 20:39:48,236 INFO L226 Difference]: Without dead ends: 111136 [2021-05-21 20:39:48,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:39:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111136 states. [2021-05-21 20:39:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111136 to 104672. [2021-05-21 20:39:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104672 states, 104671 states have (on average 2.1706967545929627) internal successors, (227209), 104671 states have internal predecessors, (227209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104672 states to 104672 states and 227209 transitions. [2021-05-21 20:39:50,113 INFO L78 Accepts]: Start accepts. Automaton has 104672 states and 227209 transitions. Word has length 49 [2021-05-21 20:39:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:50,114 INFO L482 AbstractCegarLoop]: Abstraction has 104672 states and 227209 transitions. [2021-05-21 20:39:50,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 104672 states and 227209 transitions. [2021-05-21 20:39:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:50,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:50,175 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:50,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:50,375 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash 556227897, now seen corresponding path program 230 times [2021-05-21 20:39:50,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:50,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356842994] [2021-05-21 20:39:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:50,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:50,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356842994] [2021-05-21 20:39:50,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356842994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:50,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048943877] [2021-05-21 20:39:50,397 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:50,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-21 20:39:50,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048943877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:50,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:50,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:39:50,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164239530] [2021-05-21 20:39:50,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:50,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:50,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:50,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:50,471 INFO L87 Difference]: Start difference. First operand 104672 states and 227209 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:50,777 INFO L93 Difference]: Finished difference Result 112008 states and 241759 transitions. [2021-05-21 20:39:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 49 [2021-05-21 20:39:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:50,917 INFO L225 Difference]: With dead ends: 112008 [2021-05-21 20:39:50,917 INFO L226 Difference]: Without dead ends: 112005 [2021-05-21 20:39:50,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:39:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112005 states. [2021-05-21 20:39:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112005 to 105674. [2021-05-21 20:39:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105674 states, 105673 states have (on average 2.169229604534744) internal successors, (229229), 105673 states have internal predecessors, (229229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105674 states to 105674 states and 229229 transitions. [2021-05-21 20:39:52,780 INFO L78 Accepts]: Start accepts. Automaton has 105674 states and 229229 transitions. Word has length 49 [2021-05-21 20:39:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:52,780 INFO L482 AbstractCegarLoop]: Abstraction has 105674 states and 229229 transitions. [2021-05-21 20:39:52,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-05-21 20:39:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 105674 states and 229229 transitions. [2021-05-21 20:39:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:52,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:52,841 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:53,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:53,042 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1021541939, now seen corresponding path program 231 times [2021-05-21 20:39:53,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:53,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868420050] [2021-05-21 20:39:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:53,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:53,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868420050] [2021-05-21 20:39:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868420050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:53,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739440636] [2021-05-21 20:39:53,069 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 20:39:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:39:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739440636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:39:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704205659] [2021-05-21 20:39:53,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:53,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:53,142 INFO L87 Difference]: Start difference. First operand 105674 states and 229229 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:53,476 INFO L93 Difference]: Finished difference Result 112115 states and 241822 transitions. [2021-05-21 20:39:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:39:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 49 [2021-05-21 20:39:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:53,826 INFO L225 Difference]: With dead ends: 112115 [2021-05-21 20:39:53,826 INFO L226 Difference]: Without dead ends: 112103 [2021-05-21 20:39:53,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:39:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112103 states. [2021-05-21 20:39:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112103 to 107326. [2021-05-21 20:39:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107326 states, 107325 states have (on average 2.1642767295597483) internal successors, (232281), 107325 states have internal predecessors, (232281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107326 states to 107326 states and 232281 transitions. [2021-05-21 20:39:55,281 INFO L78 Accepts]: Start accepts. Automaton has 107326 states and 232281 transitions. Word has length 49 [2021-05-21 20:39:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:55,281 INFO L482 AbstractCegarLoop]: Abstraction has 107326 states and 232281 transitions. [2021-05-21 20:39:55,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-05-21 20:39:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 107326 states and 232281 transitions. [2021-05-21 20:39:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:55,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:55,351 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:55,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-21 20:39:55,552 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash -311108491, now seen corresponding path program 232 times [2021-05-21 20:39:55,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:55,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017570510] [2021-05-21 20:39:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:55,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:55,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017570510] [2021-05-21 20:39:55,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017570510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:55,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241025587] [2021-05-21 20:39:55,584 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:39:55,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:39:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241025587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:55,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:55,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-21 20:39:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481331413] [2021-05-21 20:39:55,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:55,666 INFO L87 Difference]: Start difference. First operand 107326 states and 232281 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:56,000 INFO L93 Difference]: Finished difference Result 108240 states and 232891 transitions. [2021-05-21 20:39:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:39:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-05-21 20:39:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:56,136 INFO L225 Difference]: With dead ends: 108240 [2021-05-21 20:39:56,137 INFO L226 Difference]: Without dead ends: 108228 [2021-05-21 20:39:56,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108228 states. [2021-05-21 20:39:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108228 to 103265. [2021-05-21 20:39:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103265 states, 103264 states have (on average 2.1579446854663775) internal successors, (222838), 103264 states have internal predecessors, (222838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103265 states to 103265 states and 222838 transitions. [2021-05-21 20:39:58,010 INFO L78 Accepts]: Start accepts. Automaton has 103265 states and 222838 transitions. Word has length 49 [2021-05-21 20:39:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:58,010 INFO L482 AbstractCegarLoop]: Abstraction has 103265 states and 222838 transitions. [2021-05-21 20:39:58,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 103265 states and 222838 transitions. [2021-05-21 20:39:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:39:58,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:58,075 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:58,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-21 20:39:58,276 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1989442113, now seen corresponding path program 233 times [2021-05-21 20:39:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:58,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116206015] [2021-05-21 20:39:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:39:58,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:58,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116206015] [2021-05-21 20:39:58,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116206015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:58,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817806779] [2021-05-21 20:39:58,309 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:58,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:39:58,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:39:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:39:58,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817806779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:58,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:58,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-21 20:39:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212257604] [2021-05-21 20:39:58,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:58,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:58,379 INFO L87 Difference]: Start difference. First operand 103265 states and 222838 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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) [2021-05-21 20:39:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:58,714 INFO L93 Difference]: Finished difference Result 104033 states and 224074 transitions. [2021-05-21 20:39:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:39:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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 49 [2021-05-21 20:39:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:58,852 INFO L225 Difference]: With dead ends: 104033 [2021-05-21 20:39:58,852 INFO L226 Difference]: Without dead ends: 103903 [2021-05-21 20:39:58,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:39:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103903 states. [2021-05-21 20:40:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103903 to 103141. [2021-05-21 20:40:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103141 states, 103140 states have (on average 2.135592398681404) internal successors, (220265), 103140 states have internal predecessors, (220265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103141 states to 103141 states and 220265 transitions. [2021-05-21 20:40:00,638 INFO L78 Accepts]: Start accepts. Automaton has 103141 states and 220265 transitions. Word has length 49 [2021-05-21 20:40:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:00,638 INFO L482 AbstractCegarLoop]: Abstraction has 103141 states and 220265 transitions. [2021-05-21 20:40:00,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 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) [2021-05-21 20:40:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 103141 states and 220265 transitions. [2021-05-21 20:40:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:00,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:00,698 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:00,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-21 20:40:00,898 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1596619917, now seen corresponding path program 234 times [2021-05-21 20:40:00,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:00,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087943121] [2021-05-21 20:40:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:00,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:00,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087943121] [2021-05-21 20:40:00,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087943121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:00,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781207541] [2021-05-21 20:40:00,926 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:00,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:40:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:40:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781207541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:00,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:00,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:40:00,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974184623] [2021-05-21 20:40:00,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:40:00,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:40:00,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:40:00,994 INFO L87 Difference]: Start difference. First operand 103141 states and 220265 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 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) [2021-05-21 20:40:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:01,289 INFO L93 Difference]: Finished difference Result 103620 states and 221040 transitions. [2021-05-21 20:40:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:40:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 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 49 [2021-05-21 20:40:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:01,422 INFO L225 Difference]: With dead ends: 103620 [2021-05-21 20:40:01,422 INFO L226 Difference]: Without dead ends: 103550 [2021-05-21 20:40:01,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:40:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103550 states. [2021-05-21 20:40:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103550 to 103135. [2021-05-21 20:40:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103135 states, 103134 states have (on average 2.1305679989140343) internal successors, (219734), 103134 states have internal predecessors, (219734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103135 states to 103135 states and 219734 transitions. [2021-05-21 20:40:02,930 INFO L78 Accepts]: Start accepts. Automaton has 103135 states and 219734 transitions. Word has length 49 [2021-05-21 20:40:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:02,930 INFO L482 AbstractCegarLoop]: Abstraction has 103135 states and 219734 transitions. [2021-05-21 20:40:02,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 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) [2021-05-21 20:40:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 103135 states and 219734 transitions. [2021-05-21 20:40:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:03,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:03,000 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:03,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-21 20:40:03,205 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1597148801, now seen corresponding path program 235 times [2021-05-21 20:40:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:03,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389443996] [2021-05-21 20:40:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:03,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:03,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389443996] [2021-05-21 20:40:03,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389443996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:03,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591251433] [2021-05-21 20:40:03,232 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591251433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:03,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:03,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:40:03,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023977369] [2021-05-21 20:40:03,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:40:03,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:40:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:40:03,309 INFO L87 Difference]: Start difference. First operand 103135 states and 219734 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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) [2021-05-21 20:40:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:03,974 INFO L93 Difference]: Finished difference Result 104133 states and 221779 transitions. [2021-05-21 20:40:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:40:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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 49 [2021-05-21 20:40:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:04,120 INFO L225 Difference]: With dead ends: 104133 [2021-05-21 20:40:04,121 INFO L226 Difference]: Without dead ends: 104127 [2021-05-21 20:40:04,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:40:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-05-21 20:40:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 103789. [2021-05-21 20:40:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103789 states, 103788 states have (on average 2.131229043820095) internal successors, (221196), 103788 states have internal predecessors, (221196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103789 states to 103789 states and 221196 transitions. [2021-05-21 20:40:05,726 INFO L78 Accepts]: Start accepts. Automaton has 103789 states and 221196 transitions. Word has length 49 [2021-05-21 20:40:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:05,726 INFO L482 AbstractCegarLoop]: Abstraction has 103789 states and 221196 transitions. [2021-05-21 20:40:05,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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) [2021-05-21 20:40:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 103789 states and 221196 transitions. [2021-05-21 20:40:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:05,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:05,797 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:05,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:05,997 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1191781061, now seen corresponding path program 236 times [2021-05-21 20:40:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:05,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961596670] [2021-05-21 20:40:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:06,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:06,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961596670] [2021-05-21 20:40:06,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961596670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:06,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821471466] [2021-05-21 20:40:06,021 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:06,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:06,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821471466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:06,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:06,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:40:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230853600] [2021-05-21 20:40:06,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:40:06,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:40:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:40:06,092 INFO L87 Difference]: Start difference. First operand 103789 states and 221196 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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) [2021-05-21 20:40:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:06,768 INFO L93 Difference]: Finished difference Result 107443 states and 228452 transitions. [2021-05-21 20:40:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:40:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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 49 [2021-05-21 20:40:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:06,914 INFO L225 Difference]: With dead ends: 107443 [2021-05-21 20:40:06,914 INFO L226 Difference]: Without dead ends: 107440 [2021-05-21 20:40:06,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:40:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107440 states. [2021-05-21 20:40:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107440 to 103945. [2021-05-21 20:40:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103945 states, 103944 states have (on average 2.1310513353344107) internal successors, (221510), 103944 states have internal predecessors, (221510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103945 states to 103945 states and 221510 transitions. [2021-05-21 20:40:08,335 INFO L78 Accepts]: Start accepts. Automaton has 103945 states and 221510 transitions. Word has length 49 [2021-05-21 20:40:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:08,335 INFO L482 AbstractCegarLoop]: Abstraction has 103945 states and 221510 transitions. [2021-05-21 20:40:08,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 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) [2021-05-21 20:40:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 103945 states and 221510 transitions. [2021-05-21 20:40:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:08,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:08,402 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:08,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-05-21 20:40:08,603 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1657095103, now seen corresponding path program 237 times [2021-05-21 20:40:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:08,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922483420] [2021-05-21 20:40:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:08,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:08,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922483420] [2021-05-21 20:40:08,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922483420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:08,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605012566] [2021-05-21 20:40:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:08,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:40:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:08,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605012566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:08,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:08,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:40:08,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485007241] [2021-05-21 20:40:08,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:40:08,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:40:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:40:08,703 INFO L87 Difference]: Start difference. First operand 103945 states and 221510 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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) [2021-05-21 20:40:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:09,046 INFO L93 Difference]: Finished difference Result 107813 states and 229254 transitions. [2021-05-21 20:40:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:40:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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 49 [2021-05-21 20:40:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:09,183 INFO L225 Difference]: With dead ends: 107813 [2021-05-21 20:40:09,183 INFO L226 Difference]: Without dead ends: 107801 [2021-05-21 20:40:09,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:40:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107801 states. [2021-05-21 20:40:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107801 to 104405. [2021-05-21 20:40:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104405 states, 104404 states have (on average 2.130464350024903) internal successors, (222429), 104404 states have internal predecessors, (222429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104405 states to 104405 states and 222429 transitions. [2021-05-21 20:40:11,034 INFO L78 Accepts]: Start accepts. Automaton has 104405 states and 222429 transitions. Word has length 49 [2021-05-21 20:40:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:11,034 INFO L482 AbstractCegarLoop]: Abstraction has 104405 states and 222429 transitions. [2021-05-21 20:40:11,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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) [2021-05-21 20:40:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 104405 states and 222429 transitions. [2021-05-21 20:40:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:11,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:11,100 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:11,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:11,305 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 324444673, now seen corresponding path program 238 times [2021-05-21 20:40:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:11,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335679631] [2021-05-21 20:40:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:11,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:11,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335679631] [2021-05-21 20:40:11,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335679631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:11,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505261417] [2021-05-21 20:40:11,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:11,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:40:11,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505261417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:11,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:11,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 20:40:11,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889808712] [2021-05-21 20:40:11,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:40:11,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:11,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:40:11,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:11,412 INFO L87 Difference]: Start difference. First operand 104405 states and 222429 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 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) [2021-05-21 20:40:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:11,758 INFO L93 Difference]: Finished difference Result 105970 states and 225532 transitions. [2021-05-21 20:40:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:40:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 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 49 [2021-05-21 20:40:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:11,890 INFO L225 Difference]: With dead ends: 105970 [2021-05-21 20:40:11,890 INFO L226 Difference]: Without dead ends: 105949 [2021-05-21 20:40:11,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:40:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105949 states. [2021-05-21 20:40:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105949 to 104792. [2021-05-21 20:40:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104792 states, 104791 states have (on average 2.130039793493716) internal successors, (223209), 104791 states have internal predecessors, (223209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104792 states to 104792 states and 223209 transitions. [2021-05-21 20:40:13,752 INFO L78 Accepts]: Start accepts. Automaton has 104792 states and 223209 transitions. Word has length 49 [2021-05-21 20:40:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 104792 states and 223209 transitions. [2021-05-21 20:40:13,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 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) [2021-05-21 20:40:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 104792 states and 223209 transitions. [2021-05-21 20:40:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 20:40:13,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:13,813 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:14,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:14,013 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2013168767, now seen corresponding path program 239 times [2021-05-21 20:40:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:14,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027988308] [2021-05-21 20:40:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:14,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:14,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027988308] [2021-05-21 20:40:14,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027988308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:14,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085863273] [2021-05-21 20:40:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:14,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:40:14,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:40:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:40:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085863273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:14,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:14,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 20:40:14,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976111008] [2021-05-21 20:40:14,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:40:14,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:40:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:40:14,137 INFO L87 Difference]: Start difference. First operand 104792 states and 223209 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 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) [2021-05-21 20:40:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:14,512 INFO L93 Difference]: Finished difference Result 105229 states and 223836 transitions. [2021-05-21 20:40:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:40:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 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 49 [2021-05-21 20:40:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:14,659 INFO L225 Difference]: With dead ends: 105229 [2021-05-21 20:40:14,660 INFO L226 Difference]: Without dead ends: 105208 [2021-05-21 20:40:14,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:40:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105208 states. [2021-05-21 20:40:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105208 to 103734. [2021-05-21 20:40:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103734 states, 103733 states have (on average 2.1289849903116655) internal successors, (220846), 103733 states have internal predecessors, (220846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103734 states to 103734 states and 220846 transitions. [2021-05-21 20:40:16,177 INFO L78 Accepts]: Start accepts. Automaton has 103734 states and 220846 transitions. Word has length 49 [2021-05-21 20:40:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:16,177 INFO L482 AbstractCegarLoop]: Abstraction has 103734 states and 220846 transitions. [2021-05-21 20:40:16,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 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) [2021-05-21 20:40:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 103734 states and 220846 transitions. [2021-05-21 20:40:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:16,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:16,244 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:16,444 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1555672066, now seen corresponding path program 10 times [2021-05-21 20:40:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916544247] [2021-05-21 20:40:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:16,765 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-21 20:40:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:16,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916544247] [2021-05-21 20:40:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916544247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699424162] [2021-05-21 20:40:16,817 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:16,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:40:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699424162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:16,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:16,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 20:40:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705371405] [2021-05-21 20:40:16,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:40:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:40:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:40:16,918 INFO L87 Difference]: Start difference. First operand 103734 states and 220846 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:17,335 INFO L93 Difference]: Finished difference Result 109277 states and 231415 transitions. [2021-05-21 20:40:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:17,472 INFO L225 Difference]: With dead ends: 109277 [2021-05-21 20:40:17,472 INFO L226 Difference]: Without dead ends: 109277 [2021-05-21 20:40:17,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109277 states. [2021-05-21 20:40:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109277 to 104079. [2021-05-21 20:40:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104079 states, 104078 states have (on average 2.1292396087549723) internal successors, (221607), 104078 states have internal predecessors, (221607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104079 states to 104079 states and 221607 transitions. [2021-05-21 20:40:19,002 INFO L78 Accepts]: Start accepts. Automaton has 104079 states and 221607 transitions. Word has length 50 [2021-05-21 20:40:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:19,002 INFO L482 AbstractCegarLoop]: Abstraction has 104079 states and 221607 transitions. [2021-05-21 20:40:19,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 104079 states and 221607 transitions. [2021-05-21 20:40:19,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:19,074 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:19,074 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:19,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:19,274 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:19,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1056573138, now seen corresponding path program 240 times [2021-05-21 20:40:19,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:19,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171744545] [2021-05-21 20:40:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:19,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171744545] [2021-05-21 20:40:19,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171744545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:19,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787663787] [2021-05-21 20:40:19,769 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:19,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:40:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:19,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787663787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:20,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:20,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-05-21 20:40:20,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250689076] [2021-05-21 20:40:20,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 20:40:20,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:20,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 20:40:20,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:40:20,375 INFO L87 Difference]: Start difference. First operand 104079 states and 221607 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:22,403 INFO L93 Difference]: Finished difference Result 115039 states and 245470 transitions. [2021-05-21 20:40:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:40:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:22,538 INFO L225 Difference]: With dead ends: 115039 [2021-05-21 20:40:22,538 INFO L226 Difference]: Without dead ends: 115005 [2021-05-21 20:40:22,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1547.6ms TimeCoverageRelationStatistics Valid=215, Invalid=3445, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:40:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-05-21 20:40:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 107215. [2021-05-21 20:40:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107215 states, 107214 states have (on average 2.1362508627604604) internal successors, (229036), 107214 states have internal predecessors, (229036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107215 states to 107215 states and 229036 transitions. [2021-05-21 20:40:23,921 INFO L78 Accepts]: Start accepts. Automaton has 107215 states and 229036 transitions. Word has length 50 [2021-05-21 20:40:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:23,921 INFO L482 AbstractCegarLoop]: Abstraction has 107215 states and 229036 transitions. [2021-05-21 20:40:23,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 107215 states and 229036 transitions. [2021-05-21 20:40:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:23,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:23,993 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:24,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-05-21 20:40:24,194 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -66547302, now seen corresponding path program 241 times [2021-05-21 20:40:24,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:24,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264899643] [2021-05-21 20:40:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264899643] [2021-05-21 20:40:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264899643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823110313] [2021-05-21 20:40:24,401 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:24,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823110313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:24,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:24,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:40:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720080979] [2021-05-21 20:40:24,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:40:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:40:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:24,781 INFO L87 Difference]: Start difference. First operand 107215 states and 229036 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:26,277 INFO L93 Difference]: Finished difference Result 107853 states and 230430 transitions. [2021-05-21 20:40:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:40:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:26,423 INFO L225 Difference]: With dead ends: 107853 [2021-05-21 20:40:26,423 INFO L226 Difference]: Without dead ends: 107836 [2021-05-21 20:40:26,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 800.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:40:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107836 states. [2021-05-21 20:40:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107836 to 107611. [2021-05-21 20:40:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107611 states, 107610 states have (on average 2.137031874361119) internal successors, (229966), 107610 states have internal predecessors, (229966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107611 states to 107611 states and 229966 transitions. [2021-05-21 20:40:27,990 INFO L78 Accepts]: Start accepts. Automaton has 107611 states and 229966 transitions. Word has length 50 [2021-05-21 20:40:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:27,990 INFO L482 AbstractCegarLoop]: Abstraction has 107611 states and 229966 transitions. [2021-05-21 20:40:27,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 107611 states and 229966 transitions. [2021-05-21 20:40:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:28,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:28,062 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:28,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-05-21 20:40:28,263 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:28,263 INFO L82 PathProgramCache]: Analyzing trace with hash -352438574, now seen corresponding path program 242 times [2021-05-21 20:40:28,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:28,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185338640] [2021-05-21 20:40:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:28,626 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-21 20:40:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:28,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185338640] [2021-05-21 20:40:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185338640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661550856] [2021-05-21 20:40:28,852 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:28,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:29,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661550856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:29,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:29,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:40:29,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5482256] [2021-05-21 20:40:29,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:40:29,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:40:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:29,255 INFO L87 Difference]: Start difference. First operand 107611 states and 229966 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:30,574 INFO L93 Difference]: Finished difference Result 108290 states and 231449 transitions. [2021-05-21 20:40:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 20:40:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:30,710 INFO L225 Difference]: With dead ends: 108290 [2021-05-21 20:40:30,710 INFO L226 Difference]: Without dead ends: 108273 [2021-05-21 20:40:30,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1254.6ms TimeCoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:40:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108273 states. [2021-05-21 20:40:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108273 to 108019. [2021-05-21 20:40:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108019 states, 108018 states have (on average 2.137847395804403) internal successors, (230926), 108018 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108019 states to 108019 states and 230926 transitions. [2021-05-21 20:40:32,329 INFO L78 Accepts]: Start accepts. Automaton has 108019 states and 230926 transitions. Word has length 50 [2021-05-21 20:40:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:32,329 INFO L482 AbstractCegarLoop]: Abstraction has 108019 states and 230926 transitions. [2021-05-21 20:40:32,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 108019 states and 230926 transitions. [2021-05-21 20:40:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:32,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:32,398 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:32,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:32,601 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash 164977818, now seen corresponding path program 243 times [2021-05-21 20:40:32,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:32,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497374889] [2021-05-21 20:40:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:32,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:32,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497374889] [2021-05-21 20:40:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497374889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:32,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329993523] [2021-05-21 20:40:32,827 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 20:40:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:33,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329993523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:33,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:33,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-05-21 20:40:33,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801650663] [2021-05-21 20:40:33,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-21 20:40:33,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-21 20:40:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:40:33,443 INFO L87 Difference]: Start difference. First operand 108019 states and 230926 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:35,779 INFO L93 Difference]: Finished difference Result 115704 states and 247454 transitions. [2021-05-21 20:40:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 20:40:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:35,931 INFO L225 Difference]: With dead ends: 115704 [2021-05-21 20:40:35,931 INFO L226 Difference]: Without dead ends: 115670 [2021-05-21 20:40:35,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1455.7ms TimeCoverageRelationStatistics Valid=253, Invalid=4169, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 20:40:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115670 states. [2021-05-21 20:40:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115670 to 109731. [2021-05-21 20:40:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109731 states, 109730 states have (on average 2.1420668914608583) internal successors, (235049), 109730 states have internal predecessors, (235049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109731 states to 109731 states and 235049 transitions. [2021-05-21 20:40:37,661 INFO L78 Accepts]: Start accepts. Automaton has 109731 states and 235049 transitions. Word has length 50 [2021-05-21 20:40:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 109731 states and 235049 transitions. [2021-05-21 20:40:37,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 109731 states and 235049 transitions. [2021-05-21 20:40:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:37,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:37,736 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:37,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-21 20:40:37,936 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash 912083922, now seen corresponding path program 244 times [2021-05-21 20:40:37,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:37,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804785817] [2021-05-21 20:40:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:38,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:38,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804785817] [2021-05-21 20:40:38,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804785817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:38,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053030138] [2021-05-21 20:40:38,142 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:38,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:38,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:38,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053030138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:38,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:38,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:40:38,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013243669] [2021-05-21 20:40:38,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:40:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:40:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:38,541 INFO L87 Difference]: Start difference. First operand 109731 states and 235049 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:40,250 INFO L93 Difference]: Finished difference Result 110422 states and 236578 transitions. [2021-05-21 20:40:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:40:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:40,383 INFO L225 Difference]: With dead ends: 110422 [2021-05-21 20:40:40,383 INFO L226 Difference]: Without dead ends: 110405 [2021-05-21 20:40:40,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=162, Invalid=2288, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:40:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110405 states. [2021-05-21 20:40:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110405 to 110151. [2021-05-21 20:40:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110151 states, 110150 states have (on average 2.1429051293690424) internal successors, (236041), 110150 states have internal predecessors, (236041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110151 states to 110151 states and 236041 transitions. [2021-05-21 20:40:41,874 INFO L78 Accepts]: Start accepts. Automaton has 110151 states and 236041 transitions. Word has length 50 [2021-05-21 20:40:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:41,874 INFO L482 AbstractCegarLoop]: Abstraction has 110151 states and 236041 transitions. [2021-05-21 20:40:41,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 110151 states and 236041 transitions. [2021-05-21 20:40:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:41,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:41,942 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:42,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-21 20:40:42,142 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2010539930, now seen corresponding path program 245 times [2021-05-21 20:40:42,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:42,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869127837] [2021-05-21 20:40:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:42,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:42,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869127837] [2021-05-21 20:40:42,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869127837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:42,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695978927] [2021-05-21 20:40:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:42,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:40:42,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:43,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695978927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:43,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:43,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:40:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845461747] [2021-05-21 20:40:43,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:40:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:40:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:43,045 INFO L87 Difference]: Start difference. First operand 110151 states and 236041 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:44,691 INFO L93 Difference]: Finished difference Result 117657 states and 252327 transitions. [2021-05-21 20:40:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 20:40:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:44,839 INFO L225 Difference]: With dead ends: 117657 [2021-05-21 20:40:44,840 INFO L226 Difference]: Without dead ends: 117623 [2021-05-21 20:40:44,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1331.7ms TimeCoverageRelationStatistics Valid=195, Invalid=2775, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:40:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117623 states. [2021-05-21 20:40:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117623 to 111752. [2021-05-21 20:40:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111752 states, 111751 states have (on average 2.1464774364435217) internal successors, (239871), 111751 states have internal predecessors, (239871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111752 states to 111752 states and 239871 transitions. [2021-05-21 20:40:46,566 INFO L78 Accepts]: Start accepts. Automaton has 111752 states and 239871 transitions. Word has length 50 [2021-05-21 20:40:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:46,566 INFO L482 AbstractCegarLoop]: Abstraction has 111752 states and 239871 transitions. [2021-05-21 20:40:46,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 111752 states and 239871 transitions. [2021-05-21 20:40:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:46,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:46,639 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:46,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-05-21 20:40:46,841 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 195460306, now seen corresponding path program 246 times [2021-05-21 20:40:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420618671] [2021-05-21 20:40:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:47,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420618671] [2021-05-21 20:40:47,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420618671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:47,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981094987] [2021-05-21 20:40:47,044 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:47,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 20:40:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:47,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981094987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:47,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:47,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-05-21 20:40:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495645051] [2021-05-21 20:40:47,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 20:40:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 20:40:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:40:47,632 INFO L87 Difference]: Start difference. First operand 111752 states and 239871 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:49,544 INFO L93 Difference]: Finished difference Result 120630 states and 259055 transitions. [2021-05-21 20:40:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 20:40:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:49,691 INFO L225 Difference]: With dead ends: 120630 [2021-05-21 20:40:49,692 INFO L226 Difference]: Without dead ends: 120596 [2021-05-21 20:40:49,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1287.2ms TimeCoverageRelationStatistics Valid=223, Invalid=3437, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:40:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120596 states. [2021-05-21 20:40:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120596 to 113950. [2021-05-21 20:40:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113950 states, 113949 states have (on average 2.1507692037665973) internal successors, (245078), 113949 states have internal predecessors, (245078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113950 states to 113950 states and 245078 transitions. [2021-05-21 20:40:51,467 INFO L78 Accepts]: Start accepts. Automaton has 113950 states and 245078 transitions. Word has length 50 [2021-05-21 20:40:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:51,467 INFO L482 AbstractCegarLoop]: Abstraction has 113950 states and 245078 transitions. [2021-05-21 20:40:51,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 113950 states and 245078 transitions. [2021-05-21 20:40:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:51,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:51,530 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:51,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-05-21 20:40:51,731 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1043189094, now seen corresponding path program 247 times [2021-05-21 20:40:51,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:51,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847144796] [2021-05-21 20:40:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:51,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:51,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847144796] [2021-05-21 20:40:51,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847144796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:51,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95444962] [2021-05-21 20:40:51,930 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:51,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95444962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:52,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:52,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-05-21 20:40:52,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572289802] [2021-05-21 20:40:52,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:40:52,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:40:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:40:52,350 INFO L87 Difference]: Start difference. First operand 113950 states and 245078 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:53,819 INFO L93 Difference]: Finished difference Result 115039 states and 247462 transitions. [2021-05-21 20:40:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:40:53,819 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:53,963 INFO L225 Difference]: With dead ends: 115039 [2021-05-21 20:40:53,963 INFO L226 Difference]: Without dead ends: 115005 [2021-05-21 20:40:53,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:40:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-05-21 20:40:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 114768. [2021-05-21 20:40:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114768 states, 114767 states have (on average 2.151498252982129) internal successors, (246921), 114767 states have internal predecessors, (246921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114768 states to 114768 states and 246921 transitions. [2021-05-21 20:40:55,477 INFO L78 Accepts]: Start accepts. Automaton has 114768 states and 246921 transitions. Word has length 50 [2021-05-21 20:40:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:55,477 INFO L482 AbstractCegarLoop]: Abstraction has 114768 states and 246921 transitions. [2021-05-21 20:40:55,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 114768 states and 246921 transitions. [2021-05-21 20:40:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:40:55,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:55,547 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:55,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-05-21 20:40:55,747 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash -640708142, now seen corresponding path program 248 times [2021-05-21 20:40:55,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:55,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931977200] [2021-05-21 20:40:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:55,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:55,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931977200] [2021-05-21 20:40:55,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931977200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:55,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650154522] [2021-05-21 20:40:55,951 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:40:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:56,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650154522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:56,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:56,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-05-21 20:40:56,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328700479] [2021-05-21 20:40:56,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 20:40:56,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 20:40:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:40:56,409 INFO L87 Difference]: Start difference. First operand 114768 states and 246921 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:57,945 INFO L93 Difference]: Finished difference Result 115616 states and 248739 transitions. [2021-05-21 20:40:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:40:57,945 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:40:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:58,095 INFO L225 Difference]: With dead ends: 115616 [2021-05-21 20:40:58,095 INFO L226 Difference]: Without dead ends: 115582 [2021-05-21 20:40:58,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:40:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115582 states. [2021-05-21 20:40:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115582 to 115351. [2021-05-21 20:40:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115351 states, 115350 states have (on average 2.1517728651928913) internal successors, (248207), 115350 states have internal predecessors, (248207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115351 states to 115351 states and 248207 transitions. [2021-05-21 20:40:59,965 INFO L78 Accepts]: Start accepts. Automaton has 115351 states and 248207 transitions. Word has length 50 [2021-05-21 20:40:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 115351 states and 248207 transitions. [2021-05-21 20:40:59,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 115351 states and 248207 transitions. [2021-05-21 20:41:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:00,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:00,037 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:00,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:00,253 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1320600166, now seen corresponding path program 249 times [2021-05-21 20:41:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:00,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966654867] [2021-05-21 20:41:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:00,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966654867] [2021-05-21 20:41:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966654867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312147050] [2021-05-21 20:41:00,478 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:00,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 20:41:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:00,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312147050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:00,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:00,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 20:41:00,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530201745] [2021-05-21 20:41:00,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 20:41:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 20:41:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:41:00,950 INFO L87 Difference]: Start difference. First operand 115351 states and 248207 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:03,038 INFO L93 Difference]: Finished difference Result 136195 states and 294292 transitions. [2021-05-21 20:41:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 20:41:03,038 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:03,210 INFO L225 Difference]: With dead ends: 136195 [2021-05-21 20:41:03,210 INFO L226 Difference]: Without dead ends: 136126 [2021-05-21 20:41:03,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1080.9ms TimeCoverageRelationStatistics Valid=193, Invalid=2999, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 20:41:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136126 states. [2021-05-21 20:41:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136126 to 125194. [2021-05-21 20:41:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125194 states, 125193 states have (on average 2.1685877005902885) internal successors, (271492), 125193 states have internal predecessors, (271492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125194 states to 125194 states and 271492 transitions. [2021-05-21 20:41:05,225 INFO L78 Accepts]: Start accepts. Automaton has 125194 states and 271492 transitions. Word has length 50 [2021-05-21 20:41:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:05,225 INFO L482 AbstractCegarLoop]: Abstraction has 125194 states and 271492 transitions. [2021-05-21 20:41:05,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 125194 states and 271492 transitions. [2021-05-21 20:41:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:05,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:05,298 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:05,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:05,499 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash 559087360, now seen corresponding path program 250 times [2021-05-21 20:41:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:05,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758063985] [2021-05-21 20:41:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:05,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758063985] [2021-05-21 20:41:05,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758063985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:05,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856643085] [2021-05-21 20:41:05,703 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:05,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856643085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:06,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:06,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237615800] [2021-05-21 20:41:06,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:06,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:06,075 INFO L87 Difference]: Start difference. First operand 125194 states and 271492 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:07,872 INFO L93 Difference]: Finished difference Result 130599 states and 283149 transitions. [2021-05-21 20:41:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 20:41:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:08,048 INFO L225 Difference]: With dead ends: 130599 [2021-05-21 20:41:08,048 INFO L226 Difference]: Without dead ends: 130582 [2021-05-21 20:41:08,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:41:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130582 states. [2021-05-21 20:41:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130582 to 126179. [2021-05-21 20:41:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126179 states, 126178 states have (on average 2.170592337808493) internal successors, (273881), 126178 states have internal predecessors, (273881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126179 states to 126179 states and 273881 transitions. [2021-05-21 20:41:10,089 INFO L78 Accepts]: Start accepts. Automaton has 126179 states and 273881 transitions. Word has length 50 [2021-05-21 20:41:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:10,089 INFO L482 AbstractCegarLoop]: Abstraction has 126179 states and 273881 transitions. [2021-05-21 20:41:10,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 126179 states and 273881 transitions. [2021-05-21 20:41:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:10,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:10,155 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:10,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:10,355 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1445126806, now seen corresponding path program 251 times [2021-05-21 20:41:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:10,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701673546] [2021-05-21 20:41:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:10,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:10,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701673546] [2021-05-21 20:41:10,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701673546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:10,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144872401] [2021-05-21 20:41:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:10,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:41:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:10,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:10,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144872401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:10,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:10,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:10,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319998206] [2021-05-21 20:41:10,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:10,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:10,941 INFO L87 Difference]: Start difference. First operand 126179 states and 273881 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:12,467 INFO L93 Difference]: Finished difference Result 126824 states and 275317 transitions. [2021-05-21 20:41:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:41:12,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:12,601 INFO L225 Difference]: With dead ends: 126824 [2021-05-21 20:41:12,602 INFO L226 Difference]: Without dead ends: 126807 [2021-05-21 20:41:12,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 906.2ms TimeCoverageRelationStatistics Valid=163, Invalid=2287, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:41:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126807 states. [2021-05-21 20:41:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126807 to 126611. [2021-05-21 20:41:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126611 states, 126610 states have (on average 2.1712423979148565) internal successors, (274901), 126610 states have internal predecessors, (274901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126611 states to 126611 states and 274901 transitions. [2021-05-21 20:41:14,238 INFO L78 Accepts]: Start accepts. Automaton has 126611 states and 274901 transitions. Word has length 50 [2021-05-21 20:41:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:14,238 INFO L482 AbstractCegarLoop]: Abstraction has 126611 states and 274901 transitions. [2021-05-21 20:41:14,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 126611 states and 274901 transitions. [2021-05-21 20:41:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:14,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:14,311 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:14,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:14,511 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2030022784, now seen corresponding path program 252 times [2021-05-21 20:41:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649687729] [2021-05-21 20:41:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:15,032 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-21 20:41:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:15,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:15,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649687729] [2021-05-21 20:41:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649687729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:15,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872554622] [2021-05-21 20:41:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:15,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 20:41:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:15,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872554622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:15,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:15,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-21 20:41:15,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33512365] [2021-05-21 20:41:15,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 20:41:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 20:41:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:41:15,604 INFO L87 Difference]: Start difference. First operand 126611 states and 274901 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:18,530 INFO L93 Difference]: Finished difference Result 139988 states and 303796 transitions. [2021-05-21 20:41:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 20:41:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:18,711 INFO L225 Difference]: With dead ends: 139988 [2021-05-21 20:41:18,711 INFO L226 Difference]: Without dead ends: 139954 [2021-05-21 20:41:18,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1727.1ms TimeCoverageRelationStatistics Valid=223, Invalid=3683, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 20:41:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139954 states. [2021-05-21 20:41:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139954 to 129400. [2021-05-21 20:41:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129400 states, 129399 states have (on average 2.17611418944505) internal successors, (281587), 129399 states have internal predecessors, (281587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129400 states to 129400 states and 281587 transitions. [2021-05-21 20:41:20,756 INFO L78 Accepts]: Start accepts. Automaton has 129400 states and 281587 transitions. Word has length 50 [2021-05-21 20:41:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:20,757 INFO L482 AbstractCegarLoop]: Abstraction has 129400 states and 281587 transitions. [2021-05-21 20:41:20,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 36 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 129400 states and 281587 transitions. [2021-05-21 20:41:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:20,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:20,826 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:21,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-21 20:41:21,027 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:21,027 INFO L82 PathProgramCache]: Analyzing trace with hash -738291156, now seen corresponding path program 253 times [2021-05-21 20:41:21,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:21,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412709737] [2021-05-21 20:41:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412709737] [2021-05-21 20:41:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412709737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965382553] [2021-05-21 20:41:21,238 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965382553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:21,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:21,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379720745] [2021-05-21 20:41:21,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:21,624 INFO L87 Difference]: Start difference. First operand 129400 states and 281587 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:23,206 INFO L93 Difference]: Finished difference Result 130019 states and 282944 transitions. [2021-05-21 20:41:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 20:41:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:23,363 INFO L225 Difference]: With dead ends: 130019 [2021-05-21 20:41:23,363 INFO L226 Difference]: Without dead ends: 130002 [2021-05-21 20:41:23,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:41:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130002 states. [2021-05-21 20:41:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130002 to 129792. [2021-05-21 20:41:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129792 states, 129791 states have (on average 2.176645530121503) internal successors, (282509), 129791 states have internal predecessors, (282509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129792 states to 129792 states and 282509 transitions. [2021-05-21 20:41:25,089 INFO L78 Accepts]: Start accepts. Automaton has 129792 states and 282509 transitions. Word has length 50 [2021-05-21 20:41:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:25,089 INFO L482 AbstractCegarLoop]: Abstraction has 129792 states and 282509 transitions. [2021-05-21 20:41:25,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 129792 states and 282509 transitions. [2021-05-21 20:41:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:25,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:25,525 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-21 20:41:25,726 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1294729540, now seen corresponding path program 254 times [2021-05-21 20:41:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:25,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266191929] [2021-05-21 20:41:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:25,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:25,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266191929] [2021-05-21 20:41:25,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266191929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:25,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565966297] [2021-05-21 20:41:25,939 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:25,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:25,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:26,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565966297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:26,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:26,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372959932] [2021-05-21 20:41:26,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:26,317 INFO L87 Difference]: Start difference. First operand 129792 states and 282509 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:27,613 INFO L93 Difference]: Finished difference Result 130334 states and 283685 transitions. [2021-05-21 20:41:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:41:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:27,797 INFO L225 Difference]: With dead ends: 130334 [2021-05-21 20:41:27,797 INFO L226 Difference]: Without dead ends: 130317 [2021-05-21 20:41:27,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:41:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130317 states. [2021-05-21 20:41:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130317 to 130160. [2021-05-21 20:41:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130160 states, 130159 states have (on average 2.1770373158982474) internal successors, (283361), 130159 states have internal predecessors, (283361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130160 states to 130160 states and 283361 transitions. [2021-05-21 20:41:29,700 INFO L78 Accepts]: Start accepts. Automaton has 130160 states and 283361 transitions. Word has length 50 [2021-05-21 20:41:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:29,700 INFO L482 AbstractCegarLoop]: Abstraction has 130160 states and 283361 transitions. [2021-05-21 20:41:29,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 130160 states and 283361 transitions. [2021-05-21 20:41:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:29,774 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:29,774 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:29,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-05-21 20:41:29,975 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1008838268, now seen corresponding path program 255 times [2021-05-21 20:41:29,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:29,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935485064] [2021-05-21 20:41:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:30,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:30,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935485064] [2021-05-21 20:41:30,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935485064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:30,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254965678] [2021-05-21 20:41:30,190 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:30,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 20:41:30,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:30,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:30,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254965678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:30,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:30,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 20:41:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224195810] [2021-05-21 20:41:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 20:41:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 20:41:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:41:30,953 INFO L87 Difference]: Start difference. First operand 130160 states and 283361 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:33,279 INFO L93 Difference]: Finished difference Result 143289 states and 311725 transitions. [2021-05-21 20:41:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 20:41:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:33,704 INFO L225 Difference]: With dead ends: 143289 [2021-05-21 20:41:33,704 INFO L226 Difference]: Without dead ends: 143255 [2021-05-21 20:41:33,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1111.9ms TimeCoverageRelationStatistics Valid=193, Invalid=3113, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 20:41:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143255 states. [2021-05-21 20:41:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143255 to 134790. [2021-05-21 20:41:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134790 states, 134789 states have (on average 2.1836870961280224) internal successors, (294337), 134789 states have internal predecessors, (294337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134790 states to 134790 states and 294337 transitions. [2021-05-21 20:41:35,423 INFO L78 Accepts]: Start accepts. Automaton has 134790 states and 294337 transitions. Word has length 50 [2021-05-21 20:41:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:35,423 INFO L482 AbstractCegarLoop]: Abstraction has 134790 states and 294337 transitions. [2021-05-21 20:41:35,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 134790 states and 294337 transitions. [2021-05-21 20:41:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:35,502 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:35,502 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:35,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-05-21 20:41:35,702 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2021606532, now seen corresponding path program 256 times [2021-05-21 20:41:35,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:35,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473887273] [2021-05-21 20:41:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:36,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473887273] [2021-05-21 20:41:36,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473887273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:36,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411287589] [2021-05-21 20:41:36,249 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:36,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:36,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:36,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:36,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411287589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:36,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:36,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654152054] [2021-05-21 20:41:36,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:36,639 INFO L87 Difference]: Start difference. First operand 134790 states and 294337 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:38,019 INFO L93 Difference]: Finished difference Result 135364 states and 295606 transitions. [2021-05-21 20:41:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:41:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:38,201 INFO L225 Difference]: With dead ends: 135364 [2021-05-21 20:41:38,201 INFO L226 Difference]: Without dead ends: 135347 [2021-05-21 20:41:38,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1223.8ms TimeCoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:41:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135347 states. [2021-05-21 20:41:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135347 to 135182. [2021-05-21 20:41:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135182 states, 135181 states have (on average 2.1841161109919294) internal successors, (295251), 135181 states have internal predecessors, (295251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135182 states to 135182 states and 295251 transitions. [2021-05-21 20:41:40,155 INFO L78 Accepts]: Start accepts. Automaton has 135182 states and 295251 transitions. Word has length 50 [2021-05-21 20:41:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:40,155 INFO L482 AbstractCegarLoop]: Abstraction has 135182 states and 295251 transitions. [2021-05-21 20:41:40,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 135182 states and 295251 transitions. [2021-05-21 20:41:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:40,233 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:40,233 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:40,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-05-21 20:41:40,433 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -923150524, now seen corresponding path program 257 times [2021-05-21 20:41:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877664592] [2021-05-21 20:41:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:40,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:40,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877664592] [2021-05-21 20:41:40,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877664592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:40,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699918692] [2021-05-21 20:41:40,634 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:40,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:41:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:41,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699918692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:41,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:41,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:41:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887192264] [2021-05-21 20:41:41,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:41:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:41:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:41:41,315 INFO L87 Difference]: Start difference. First operand 135182 states and 295251 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:43,053 INFO L93 Difference]: Finished difference Result 141532 states and 309074 transitions. [2021-05-21 20:41:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 20:41:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:43,230 INFO L225 Difference]: With dead ends: 141532 [2021-05-21 20:41:43,230 INFO L226 Difference]: Without dead ends: 141498 [2021-05-21 20:41:43,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1011.2ms TimeCoverageRelationStatistics Valid=191, Invalid=2779, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:41:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141498 states. [2021-05-21 20:41:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141498 to 136755. [2021-05-21 20:41:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136755 states, 136754 states have (on average 2.186546645801951) internal successors, (299019), 136754 states have internal predecessors, (299019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136755 states to 136755 states and 299019 transitions. [2021-05-21 20:41:45,263 INFO L78 Accepts]: Start accepts. Automaton has 136755 states and 299019 transitions. Word has length 50 [2021-05-21 20:41:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:45,263 INFO L482 AbstractCegarLoop]: Abstraction has 136755 states and 299019 transitions. [2021-05-21 20:41:45,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 136755 states and 299019 transitions. [2021-05-21 20:41:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:45,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:45,338 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:45,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-21 20:41:45,538 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1556737148, now seen corresponding path program 258 times [2021-05-21 20:41:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:45,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738982489] [2021-05-21 20:41:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:45,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738982489] [2021-05-21 20:41:45,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738982489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:45,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309838647] [2021-05-21 20:41:45,736 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:45,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:41:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:46,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309838647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:46,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:46,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-05-21 20:41:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935453296] [2021-05-21 20:41:46,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 20:41:46,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:46,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 20:41:46,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:41:46,651 INFO L87 Difference]: Start difference. First operand 136755 states and 299019 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:48,581 INFO L93 Difference]: Finished difference Result 145008 states and 316887 transitions. [2021-05-21 20:41:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:41:48,581 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:49,074 INFO L225 Difference]: With dead ends: 145008 [2021-05-21 20:41:49,074 INFO L226 Difference]: Without dead ends: 144974 [2021-05-21 20:41:49,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1639.0ms TimeCoverageRelationStatistics Valid=235, Invalid=3547, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:41:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144974 states. [2021-05-21 20:41:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144974 to 138914. [2021-05-21 20:41:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138914 states, 138913 states have (on average 2.189240747806181) internal successors, (304114), 138913 states have internal predecessors, (304114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138914 states to 138914 states and 304114 transitions. [2021-05-21 20:41:50,795 INFO L78 Accepts]: Start accepts. Automaton has 138914 states and 304114 transitions. Word has length 50 [2021-05-21 20:41:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:50,795 INFO L482 AbstractCegarLoop]: Abstraction has 138914 states and 304114 transitions. [2021-05-21 20:41:50,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 138914 states and 304114 transitions. [2021-05-21 20:41:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:50,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:50,872 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:51,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:51,072 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 318087748, now seen corresponding path program 259 times [2021-05-21 20:41:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806098897] [2021-05-21 20:41:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:51,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:51,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806098897] [2021-05-21 20:41:51,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806098897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:51,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76611941] [2021-05-21 20:41:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:51,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76611941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:52,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:52,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-05-21 20:41:52,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356819350] [2021-05-21 20:41:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:41:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:41:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:41:52,044 INFO L87 Difference]: Start difference. First operand 138914 states and 304114 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:53,390 INFO L93 Difference]: Finished difference Result 139599 states and 305578 transitions. [2021-05-21 20:41:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:41:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:53,571 INFO L225 Difference]: With dead ends: 139599 [2021-05-21 20:41:53,571 INFO L226 Difference]: Without dead ends: 139565 [2021-05-21 20:41:53,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1158.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1917, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:41:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139565 states. [2021-05-21 20:41:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139565 to 139472. [2021-05-21 20:41:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139472 states, 139471 states have (on average 2.1893511912870776) internal successors, (305351), 139471 states have internal predecessors, (305351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139472 states to 139472 states and 305351 transitions. [2021-05-21 20:41:55,598 INFO L78 Accepts]: Start accepts. Automaton has 139472 states and 305351 transitions. Word has length 50 [2021-05-21 20:41:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:55,599 INFO L482 AbstractCegarLoop]: Abstraction has 139472 states and 305351 transitions. [2021-05-21 20:41:55,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 139472 states and 305351 transitions. [2021-05-21 20:41:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:41:55,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:55,676 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:55,876 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 720568700, now seen corresponding path program 260 times [2021-05-21 20:41:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:55,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544854387] [2021-05-21 20:41:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:56,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:56,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544854387] [2021-05-21 20:41:56,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544854387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:56,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749643691] [2021-05-21 20:41:56,074 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:56,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:41:56,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:41:56,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749643691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:56,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:56,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-05-21 20:41:56,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441654712] [2021-05-21 20:41:56,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 20:41:56,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:56,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 20:41:56,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:41:56,881 INFO L87 Difference]: Start difference. First operand 139472 states and 305351 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:58,123 INFO L93 Difference]: Finished difference Result 139932 states and 306297 transitions. [2021-05-21 20:41:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:41:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:41:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:58,302 INFO L225 Difference]: With dead ends: 139932 [2021-05-21 20:41:58,302 INFO L226 Difference]: Without dead ends: 139898 [2021-05-21 20:41:58,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:41:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139898 states. [2021-05-21 20:41:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139898 to 139811. [2021-05-21 20:42:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139811 states, 139810 states have (on average 2.189249696016022) internal successors, (306079), 139810 states have internal predecessors, (306079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139811 states to 139811 states and 306079 transitions. [2021-05-21 20:42:00,343 INFO L78 Accepts]: Start accepts. Automaton has 139811 states and 306079 transitions. Word has length 50 [2021-05-21 20:42:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:00,343 INFO L482 AbstractCegarLoop]: Abstraction has 139811 states and 306079 transitions. [2021-05-21 20:42:00,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 139811 states and 306079 transitions. [2021-05-21 20:42:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:00,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:00,417 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:00,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:00,618 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1226780502, now seen corresponding path program 261 times [2021-05-21 20:42:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:00,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270104351] [2021-05-21 20:42:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:00,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270104351] [2021-05-21 20:42:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270104351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950505900] [2021-05-21 20:42:00,821 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:00,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 20:42:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:01,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950505900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:01,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:01,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 20:42:01,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792553093] [2021-05-21 20:42:01,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 20:42:01,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 20:42:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:42:01,610 INFO L87 Difference]: Start difference. First operand 139811 states and 306079 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:04,322 INFO L93 Difference]: Finished difference Result 159984 states and 350646 transitions. [2021-05-21 20:42:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 20:42:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:04,507 INFO L225 Difference]: With dead ends: 159984 [2021-05-21 20:42:04,507 INFO L226 Difference]: Without dead ends: 159941 [2021-05-21 20:42:04,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=187, Invalid=2893, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 20:42:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159941 states. [2021-05-21 20:42:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159941 to 150405. [2021-05-21 20:42:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150405 states, 150404 states have (on average 2.2005265817398474) internal successors, (330968), 150404 states have internal predecessors, (330968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150405 states to 150405 states and 330968 transitions. [2021-05-21 20:42:06,764 INFO L78 Accepts]: Start accepts. Automaton has 150405 states and 330968 transitions. Word has length 50 [2021-05-21 20:42:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:06,764 INFO L482 AbstractCegarLoop]: Abstraction has 150405 states and 330968 transitions. [2021-05-21 20:42:06,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 150405 states and 330968 transitions. [2021-05-21 20:42:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:06,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:06,844 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:07,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:07,045 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1920364202, now seen corresponding path program 262 times [2021-05-21 20:42:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:07,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159736399] [2021-05-21 20:42:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:07,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:07,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159736399] [2021-05-21 20:42:07,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159736399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:07,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671721989] [2021-05-21 20:42:07,248 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:07,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:42:07,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:07,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671721989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:07,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:07,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:07,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860833938] [2021-05-21 20:42:07,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:07,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:07,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:07,624 INFO L87 Difference]: Start difference. First operand 150405 states and 330968 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:09,599 INFO L93 Difference]: Finished difference Result 155025 states and 340951 transitions. [2021-05-21 20:42:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 20:42:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:09,804 INFO L225 Difference]: With dead ends: 155025 [2021-05-21 20:42:09,805 INFO L226 Difference]: Without dead ends: 155008 [2021-05-21 20:42:09,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 973.4ms TimeCoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:42:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155008 states. [2021-05-21 20:42:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155008 to 151352. [2021-05-21 20:42:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151352 states, 151351 states have (on average 2.201782611281062) internal successors, (333242), 151351 states have internal predecessors, (333242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151352 states to 151352 states and 333242 transitions. [2021-05-21 20:42:12,068 INFO L78 Accepts]: Start accepts. Automaton has 151352 states and 333242 transitions. Word has length 50 [2021-05-21 20:42:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:12,068 INFO L482 AbstractCegarLoop]: Abstraction has 151352 states and 333242 transitions. [2021-05-21 20:42:12,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 151352 states and 333242 transitions. [2021-05-21 20:42:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:12,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:12,148 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:12,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:12,348 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1488563648, now seen corresponding path program 263 times [2021-05-21 20:42:12,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:12,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215913033] [2021-05-21 20:42:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:12,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:12,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215913033] [2021-05-21 20:42:12,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215913033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930575518] [2021-05-21 20:42:12,549 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:12,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:42:12,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:12,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930575518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607428413] [2021-05-21 20:42:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:12,922 INFO L87 Difference]: Start difference. First operand 151352 states and 333242 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:14,793 INFO L93 Difference]: Finished difference Result 151884 states and 334426 transitions. [2021-05-21 20:42:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:42:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:15,006 INFO L225 Difference]: With dead ends: 151884 [2021-05-21 20:42:15,006 INFO L226 Difference]: Without dead ends: 151867 [2021-05-21 20:42:15,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 898.1ms TimeCoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:42:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151867 states. [2021-05-21 20:42:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151867 to 151756. [2021-05-21 20:42:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151756 states, 151755 states have (on average 2.202128430694211) internal successors, (334184), 151755 states have internal predecessors, (334184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151756 states to 151756 states and 334184 transitions. [2021-05-21 20:42:17,360 INFO L78 Accepts]: Start accepts. Automaton has 151756 states and 334184 transitions. Word has length 50 [2021-05-21 20:42:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:17,360 INFO L482 AbstractCegarLoop]: Abstraction has 151756 states and 334184 transitions. [2021-05-21 20:42:17,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 151756 states and 334184 transitions. [2021-05-21 20:42:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:17,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:17,443 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:17,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-21 20:42:17,644 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash -514383274, now seen corresponding path program 264 times [2021-05-21 20:42:17,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:17,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837654632] [2021-05-21 20:42:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:17,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837654632] [2021-05-21 20:42:17,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837654632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544075389] [2021-05-21 20:42:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:17,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:42:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:18,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544075389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:18,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:18,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:18,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098106635] [2021-05-21 20:42:18,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:18,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:18,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:18,220 INFO L87 Difference]: Start difference. First operand 151756 states and 334184 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:19,948 INFO L93 Difference]: Finished difference Result 152294 states and 335371 transitions. [2021-05-21 20:42:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:42:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:20,144 INFO L225 Difference]: With dead ends: 152294 [2021-05-21 20:42:20,144 INFO L226 Difference]: Without dead ends: 152277 [2021-05-21 20:42:20,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:42:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152277 states. [2021-05-21 20:42:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152277 to 152144. [2021-05-21 20:42:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152144 states, 152143 states have (on average 2.202454269995991) internal successors, (335088), 152143 states have internal predecessors, (335088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152144 states to 152144 states and 335088 transitions. [2021-05-21 20:42:22,425 INFO L78 Accepts]: Start accepts. Automaton has 152144 states and 335088 transitions. Word has length 50 [2021-05-21 20:42:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:22,425 INFO L482 AbstractCegarLoop]: Abstraction has 152144 states and 335088 transitions. [2021-05-21 20:42:22,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 152144 states and 335088 transitions. [2021-05-21 20:42:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:22,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:22,510 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:22,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-21 20:42:22,711 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2032006618, now seen corresponding path program 265 times [2021-05-21 20:42:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:22,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782556624] [2021-05-21 20:42:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:22,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:22,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782556624] [2021-05-21 20:42:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782556624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:22,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581914921] [2021-05-21 20:42:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:22,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:23,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581914921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:23,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:23,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972918350] [2021-05-21 20:42:23,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:23,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:23,306 INFO L87 Difference]: Start difference. First operand 152144 states and 335088 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:24,248 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-21 20:42:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:24,968 INFO L93 Difference]: Finished difference Result 152712 states and 336316 transitions. [2021-05-21 20:42:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:42:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:25,164 INFO L225 Difference]: With dead ends: 152712 [2021-05-21 20:42:25,164 INFO L226 Difference]: Without dead ends: 152695 [2021-05-21 20:42:25,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1841, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:42:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152695 states. [2021-05-21 20:42:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152695 to 152518. [2021-05-21 20:42:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 2.202679045614587) internal successors, (335946), 152517 states have internal predecessors, (335946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 335946 transitions. [2021-05-21 20:42:27,427 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 335946 transitions. Word has length 50 [2021-05-21 20:42:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:27,427 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 335946 transitions. [2021-05-21 20:42:27,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 335946 transitions. [2021-05-21 20:42:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:27,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:27,510 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:27,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-21 20:42:27,710 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1745544286, now seen corresponding path program 266 times [2021-05-21 20:42:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248387494] [2021-05-21 20:42:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:27,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:27,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248387494] [2021-05-21 20:42:27,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248387494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:27,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443698808] [2021-05-21 20:42:27,942 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:27,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:27,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:27,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:28,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443698808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:28,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:28,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 32 [2021-05-21 20:42:28,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092577362] [2021-05-21 20:42:28,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:42:28,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:28,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:42:28,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:42:28,337 INFO L87 Difference]: Start difference. First operand 152518 states and 335946 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:30,219 INFO L93 Difference]: Finished difference Result 153191 states and 337397 transitions. [2021-05-21 20:42:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:42:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:30,406 INFO L225 Difference]: With dead ends: 153191 [2021-05-21 20:42:30,406 INFO L226 Difference]: Without dead ends: 153174 [2021-05-21 20:42:30,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1229.6ms TimeCoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:42:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153174 states. [2021-05-21 20:42:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153174 to 152904. [2021-05-21 20:42:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152904 states, 152903 states have (on average 2.2029260380764275) internal successors, (336834), 152903 states have internal predecessors, (336834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152904 states to 152904 states and 336834 transitions. [2021-05-21 20:42:32,593 INFO L78 Accepts]: Start accepts. Automaton has 152904 states and 336834 transitions. Word has length 50 [2021-05-21 20:42:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:32,593 INFO L482 AbstractCegarLoop]: Abstraction has 152904 states and 336834 transitions. [2021-05-21 20:42:32,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 152904 states and 336834 transitions. [2021-05-21 20:42:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:32,673 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:32,674 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:32,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-21 20:42:32,874 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash -998438182, now seen corresponding path program 267 times [2021-05-21 20:42:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:32,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31126193] [2021-05-21 20:42:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:33,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31126193] [2021-05-21 20:42:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31126193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280923789] [2021-05-21 20:42:33,080 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:33,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:42:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280923789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:33,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:33,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842528972] [2021-05-21 20:42:33,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:33,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:33,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:33,834 INFO L87 Difference]: Start difference. First operand 152904 states and 336834 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:35,158 INFO L93 Difference]: Finished difference Result 153488 states and 338113 transitions. [2021-05-21 20:42:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:42:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:35,355 INFO L225 Difference]: With dead ends: 153488 [2021-05-21 20:42:35,355 INFO L226 Difference]: Without dead ends: 153471 [2021-05-21 20:42:35,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:42:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153471 states. [2021-05-21 20:42:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153471 to 153290. [2021-05-21 20:42:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153290 states, 153289 states have (on average 2.2031848338758815) internal successors, (337724), 153289 states have internal predecessors, (337724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153290 states to 153290 states and 337724 transitions. [2021-05-21 20:42:37,677 INFO L78 Accepts]: Start accepts. Automaton has 153290 states and 337724 transitions. Word has length 50 [2021-05-21 20:42:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:37,677 INFO L482 AbstractCegarLoop]: Abstraction has 153290 states and 337724 transitions. [2021-05-21 20:42:37,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 153290 states and 337724 transitions. [2021-05-21 20:42:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:37,759 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:37,759 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:37,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:37,959 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash 100017826, now seen corresponding path program 268 times [2021-05-21 20:42:37,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:37,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089696789] [2021-05-21 20:42:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:38,474 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-21 20:42:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:38,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089696789] [2021-05-21 20:42:38,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089696789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364365362] [2021-05-21 20:42:38,542 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:38,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:42:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:38,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364365362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:38,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:38,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:42:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300225157] [2021-05-21 20:42:38,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:42:38,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:42:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:42:38,931 INFO L87 Difference]: Start difference. First operand 153290 states and 337724 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:40,425 INFO L93 Difference]: Finished difference Result 154007 states and 339304 transitions. [2021-05-21 20:42:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:42:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:40,619 INFO L225 Difference]: With dead ends: 154007 [2021-05-21 20:42:40,619 INFO L226 Difference]: Without dead ends: 153973 [2021-05-21 20:42:40,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1274.5ms TimeCoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:42:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153973 states. [2021-05-21 20:42:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153973 to 153807. [2021-05-21 20:42:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153807 states, 153806 states have (on average 2.203412090555635) internal successors, (338898), 153806 states have internal predecessors, (338898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153807 states to 153807 states and 338898 transitions. [2021-05-21 20:42:43,141 INFO L78 Accepts]: Start accepts. Automaton has 153807 states and 338898 transitions. Word has length 50 [2021-05-21 20:42:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:43,142 INFO L482 AbstractCegarLoop]: Abstraction has 153807 states and 338898 transitions. [2021-05-21 20:42:43,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 153807 states and 338898 transitions. [2021-05-21 20:42:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:43,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:43,274 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:43,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:43,474 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:43,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:43,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1341256098, now seen corresponding path program 269 times [2021-05-21 20:42:43,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:43,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437262490] [2021-05-21 20:42:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:43,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:43,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437262490] [2021-05-21 20:42:43,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437262490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:43,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884015642] [2021-05-21 20:42:43,681 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:43,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:42:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:44,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884015642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:44,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:44,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-05-21 20:42:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479383680] [2021-05-21 20:42:44,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 20:42:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 20:42:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:42:44,145 INFO L87 Difference]: Start difference. First operand 153807 states and 338898 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:45,837 INFO L93 Difference]: Finished difference Result 154356 states and 340052 transitions. [2021-05-21 20:42:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:42:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:46,028 INFO L225 Difference]: With dead ends: 154356 [2021-05-21 20:42:46,028 INFO L226 Difference]: Without dead ends: 154322 [2021-05-21 20:42:46,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:42:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154322 states. [2021-05-21 20:42:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154322 to 154216. [2021-05-21 20:42:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154216 states, 154215 states have (on average 2.2033719158317933) internal successors, (339793), 154215 states have internal predecessors, (339793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154216 states to 154216 states and 339793 transitions. [2021-05-21 20:42:48,296 INFO L78 Accepts]: Start accepts. Automaton has 154216 states and 339793 transitions. Word has length 50 [2021-05-21 20:42:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:48,296 INFO L482 AbstractCegarLoop]: Abstraction has 154216 states and 339793 transitions. [2021-05-21 20:42:48,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 154216 states and 339793 transitions. [2021-05-21 20:42:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:48,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:48,384 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:48,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-05-21 20:42:48,584 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1743737050, now seen corresponding path program 270 times [2021-05-21 20:42:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:48,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931058610] [2021-05-21 20:42:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:48,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:48,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931058610] [2021-05-21 20:42:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931058610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:48,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358731028] [2021-05-21 20:42:48,791 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:48,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 20:42:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:42:49,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358731028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:49,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:49,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-05-21 20:42:49,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040652444] [2021-05-21 20:42:49,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 20:42:49,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 20:42:49,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:42:49,261 INFO L87 Difference]: Start difference. First operand 154216 states and 339793 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:50,895 INFO L93 Difference]: Finished difference Result 154653 states and 340693 transitions. [2021-05-21 20:42:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:42:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:51,090 INFO L225 Difference]: With dead ends: 154653 [2021-05-21 20:42:51,090 INFO L226 Difference]: Without dead ends: 154619 [2021-05-21 20:42:51,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=168, Invalid=2282, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:42:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154619 states. [2021-05-21 20:42:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154619 to 154519. [2021-05-21 20:42:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154519 states, 154518 states have (on average 2.2032578728691803) internal successors, (340443), 154518 states have internal predecessors, (340443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154519 states to 154519 states and 340443 transitions. [2021-05-21 20:42:53,376 INFO L78 Accepts]: Start accepts. Automaton has 154519 states and 340443 transitions. Word has length 50 [2021-05-21 20:42:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:53,376 INFO L482 AbstractCegarLoop]: Abstraction has 154519 states and 340443 transitions. [2021-05-21 20:42:53,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 154519 states and 340443 transitions. [2021-05-21 20:42:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:53,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:53,456 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:53,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:53,656 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1063845026, now seen corresponding path program 271 times [2021-05-21 20:42:53,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:53,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719429701] [2021-05-21 20:42:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:53,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719429701] [2021-05-21 20:42:53,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719429701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939319586] [2021-05-21 20:42:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:42:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939319586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:54,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:54,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 20:42:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497799028] [2021-05-21 20:42:54,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 20:42:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 20:42:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:42:54,381 INFO L87 Difference]: Start difference. First operand 154519 states and 340443 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:56,372 INFO L93 Difference]: Finished difference Result 162613 states and 357907 transitions. [2021-05-21 20:42:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:42:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:42:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:56,583 INFO L225 Difference]: With dead ends: 162613 [2021-05-21 20:42:56,583 INFO L226 Difference]: Without dead ends: 162570 [2021-05-21 20:42:56,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 967.4ms TimeCoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:42:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162570 states. [2021-05-21 20:42:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162570 to 156146. [2021-05-21 20:42:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156146 states, 156145 states have (on average 2.2040283070223188) internal successors, (344148), 156145 states have internal predecessors, (344148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156146 states to 156146 states and 344148 transitions. [2021-05-21 20:42:58,943 INFO L78 Accepts]: Start accepts. Automaton has 156146 states and 344148 transitions. Word has length 50 [2021-05-21 20:42:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:58,943 INFO L482 AbstractCegarLoop]: Abstraction has 156146 states and 344148 transitions. [2021-05-21 20:42:58,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 156146 states and 344148 transitions. [2021-05-21 20:42:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:42:59,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:59,025 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:59,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:59,225 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash 126651188, now seen corresponding path program 272 times [2021-05-21 20:42:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698170499] [2021-05-21 20:42:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:59,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:59,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698170499] [2021-05-21 20:42:59,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698170499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:59,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170056357] [2021-05-21 20:42:59,831 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:59,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:59,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:42:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:43:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170056357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:00,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:00,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-05-21 20:43:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703628957] [2021-05-21 20:43:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 20:43:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 20:43:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:43:00,241 INFO L87 Difference]: Start difference. First operand 156146 states and 344148 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:01,750 INFO L93 Difference]: Finished difference Result 161354 states and 355287 transitions. [2021-05-21 20:43:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:43:01,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:43:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:02,254 INFO L225 Difference]: With dead ends: 161354 [2021-05-21 20:43:02,254 INFO L226 Difference]: Without dead ends: 161320 [2021-05-21 20:43:02,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1381.2ms TimeCoverageRelationStatistics Valid=191, Invalid=2671, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:43:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161320 states. [2021-05-21 20:43:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161320 to 156403. [2021-05-21 20:43:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156403 states, 156402 states have (on average 2.2040510990908047) internal successors, (344718), 156402 states have internal predecessors, (344718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156403 states to 156403 states and 344718 transitions. [2021-05-21 20:43:04,597 INFO L78 Accepts]: Start accepts. Automaton has 156403 states and 344718 transitions. Word has length 50 [2021-05-21 20:43:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:04,597 INFO L482 AbstractCegarLoop]: Abstraction has 156403 states and 344718 transitions. [2021-05-21 20:43:04,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 156403 states and 344718 transitions. [2021-05-21 20:43:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:43:04,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:04,678 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:04,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:04,878 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1351434744, now seen corresponding path program 273 times [2021-05-21 20:43:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:04,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852147484] [2021-05-21 20:43:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:05,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852147484] [2021-05-21 20:43:05,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852147484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382480768] [2021-05-21 20:43:05,104 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:43:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:43:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:43:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:43:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382480768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:05,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:05,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-21 20:43:05,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932714602] [2021-05-21 20:43:05,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 20:43:05,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:05,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 20:43:05,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 20:43:05,613 INFO L87 Difference]: Start difference. First operand 156403 states and 344718 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:08,299 INFO L93 Difference]: Finished difference Result 170499 states and 374935 transitions. [2021-05-21 20:43:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:43:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:43:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:08,518 INFO L225 Difference]: With dead ends: 170499 [2021-05-21 20:43:08,519 INFO L226 Difference]: Without dead ends: 170465 [2021-05-21 20:43:08,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=214, Invalid=3568, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:43:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170465 states. [2021-05-21 20:43:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170465 to 159481. [2021-05-21 20:43:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159481 states, 159480 states have (on average 2.2073865061449713) internal successors, (352034), 159480 states have internal predecessors, (352034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159481 states to 159481 states and 352034 transitions. [2021-05-21 20:43:10,851 INFO L78 Accepts]: Start accepts. Automaton has 159481 states and 352034 transitions. Word has length 50 [2021-05-21 20:43:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:10,851 INFO L482 AbstractCegarLoop]: Abstraction has 159481 states and 352034 transitions. [2021-05-21 20:43:10,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 159481 states and 352034 transitions. [2021-05-21 20:43:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:43:10,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:10,934 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:11,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-05-21 20:43:11,134 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -465395298, now seen corresponding path program 274 times [2021-05-21 20:43:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:11,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012367588] [2021-05-21 20:43:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:11,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:11,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012367588] [2021-05-21 20:43:11,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012367588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:11,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319005109] [2021-05-21 20:43:11,682 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:11,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:43:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:43:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319005109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:12,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:12,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-05-21 20:43:12,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382768298] [2021-05-21 20:43:12,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 20:43:12,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 20:43:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:43:12,111 INFO L87 Difference]: Start difference. First operand 159481 states and 352034 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:13,461 INFO L93 Difference]: Finished difference Result 160015 states and 353212 transitions. [2021-05-21 20:43:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:43:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:43:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:13,678 INFO L225 Difference]: With dead ends: 160015 [2021-05-21 20:43:13,678 INFO L226 Difference]: Without dead ends: 159998 [2021-05-21 20:43:13,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1156.3ms TimeCoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:43:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159998 states. [2021-05-21 20:43:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159998 to 159871. [2021-05-21 20:43:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159871 states, 159870 states have (on average 2.2076312003502845) internal successors, (352934), 159870 states have internal predecessors, (352934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159871 states to 159871 states and 352934 transitions. [2021-05-21 20:43:16,398 INFO L78 Accepts]: Start accepts. Automaton has 159871 states and 352934 transitions. Word has length 50 [2021-05-21 20:43:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:16,398 INFO L482 AbstractCegarLoop]: Abstraction has 159871 states and 352934 transitions. [2021-05-21 20:43:16,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 159871 states and 352934 transitions. [2021-05-21 20:43:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 20:43:16,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:16,482 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:16,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-05-21 20:43:16,683 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 354422408, now seen corresponding path program 275 times [2021-05-21 20:43:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:16,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260856176] [2021-05-21 20:43:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:16,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:16,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260856176] [2021-05-21 20:43:16,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260856176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:16,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563964322] [2021-05-21 20:43:16,911 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:16,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 20:43:16,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 20:43:16,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:43:17,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563964322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:17,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:17,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2021-05-21 20:43:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858684691] [2021-05-21 20:43:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 20:43:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 20:43:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:43:17,508 INFO L87 Difference]: Start difference. First operand 159871 states and 352934 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:20,243 INFO L93 Difference]: Finished difference Result 161459 states and 356253 transitions. [2021-05-21 20:43:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 20:43:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 20:43:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:20,453 INFO L225 Difference]: With dead ends: 161459 [2021-05-21 20:43:20,453 INFO L226 Difference]: Without dead ends: 161442 [2021-05-21 20:43:20,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1370.7ms TimeCoverageRelationStatistics Valid=239, Invalid=3921, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 20:43:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161442 states. Received shutdown request... [2021-05-21 20:43:21,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-21 20:43:21,655 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 20:43:21,657 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 20:43:21,658 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 20:43:21,658 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:43:21 BasicIcfg [2021-05-21 20:43:21,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:43:21,658 INFO L168 Benchmark]: Toolchain (without parser) took 756665.08 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 315.6 MB in the beginning and 8.4 GB in the end (delta: -8.0 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 335.5 MB. Free memory is still 316.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.45 ms. Allocated memory is still 335.5 MB. Free memory was 315.5 MB in the beginning and 314.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L168 Benchmark]: Boogie Preprocessor took 11.59 ms. Allocated memory is still 335.5 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L168 Benchmark]: RCFGBuilder took 200.88 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 302.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L168 Benchmark]: TraceAbstraction took 756421.00 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 301.9 MB in the beginning and 8.4 GB in the end (delta: -8.1 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-05-21 20:43:21,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 335.5 MB. Free memory is still 316.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.45 ms. Allocated memory is still 335.5 MB. Free memory was 315.5 MB in the beginning and 314.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.59 ms. Allocated memory is still 335.5 MB. Free memory was 314.1 MB in the beginning and 313.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 200.88 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 302.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 756421.00 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 301.9 MB in the beginning and 8.4 GB in the end (delta: -8.1 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 756366.3ms, OverallIterations: 289, TraceHistogramMax: 8, EmptinessCheckTime: 12521.7ms, AutomataDifference: 271577.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24573 SDtfs, 50752 SDslu, 366421 SDs, 0 SdLazy, 293236 SolverSat, 5942 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92462.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18426 GetRequests, 8948 SyntacticMatches, 591 SemanticMatches, 8887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58519 ImplicationChecksByTransitivity, 150904.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188453occurred in iteration=223, InterpolantAutomatonStates: 7430, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 299535.6ms AutomataMinimizationTime, 289 MinimizatonAttempts, 605837 StatesRemovedByMinimization, 288 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 931.4ms SsaConstructionTime, 2767.4ms SatisfiabilityAnalysisTime, 105677.3ms InterpolantComputationTime, 23322 NumberOfCodeBlocks, 23302 NumberOfCodeBlocksAsserted, 1328 NumberOfCheckSat, 22747 ConstructedInterpolants, 0 QuantifiedInterpolants, 267901 SizeOfPredicates, 1174 NumberOfNonLiveVariables, 21508 ConjunctsInSsa, 6243 ConjunctsInUnsatCore, 575 InterpolantComputations, 3 PerfectInterpolantSequences, 4206/30853 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown