/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:13:50,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:13:50,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:13:50,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:13:50,896 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 [2021-03-10 23:13:50,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:13:50,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:13:50,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:13:50,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:13:50,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:13:50,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:13:50,941 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:13:50,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:13:50,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:13:50,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:13:50,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:13:50,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:13:50,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:13:50,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:13:50,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:13:50,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:13:50,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:13:50,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:13:50,945 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:13:50,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:13:50,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:13:51,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:13:51,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:13:51,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:13:51,310 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:13:51,311 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:13:51,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-03-10 23:13:51,312 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-03-10 23:13:51,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:13:51,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:13:51,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:13:51,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:13:51,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:13:51,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:13:51,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:13:51,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:13:51,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:13:51,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/1) ... [2021-03-10 23:13:51,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:13:51,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:13:51,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:13:51,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:13:51,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (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 [2021-03-10 23:13:51,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:13:51,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:13:51,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:13:51,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:13:51,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:13:51,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:13:51,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:13:51,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:13:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:13:51,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:13:51,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:13:51,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:13:51,437 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:13:51,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:13:51,701 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:13:51,702 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:13:51 BoogieIcfgContainer [2021-03-10 23:13:51,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:13:51,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:13:51,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:13:51,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:13:51,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:13:51" (1/2) ... [2021-03-10 23:13:51,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ef968c and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:13:51, skipping insertion in model container [2021-03-10 23:13:51,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:13:51" (2/2) ... [2021-03-10 23:13:51,708 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-03-10 23:13:51,713 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:13:51,713 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:13:51,733 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:13:51,733 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:13:51,778 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:13:51,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:13:51,807 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:13:51,808 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:13:51,808 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:13:51,808 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:13:51,808 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:13:51,808 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:13:51,808 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:13:51,808 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:13:51,816 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-03-10 23:13:51,837 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:13:51,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:51,847 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:51,847 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-03-10 23:13:51,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:51,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539253843] [2021-03-10 23:13:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:51,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539253843] [2021-03-10 23:13:51,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:51,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:13:51,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135475621] [2021-03-10 23:13:51,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:13:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:13:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:13:52,014 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-03-10 23:13:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,096 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-03-10 23:13:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:13:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:13:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,118 INFO L225 Difference]: With dead ends: 186 [2021-03-10 23:13:52,118 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 23:13:52,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 23:13:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-03-10 23:13:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-03-10 23:13:52,189 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-03-10 23:13:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,189 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-03-10 23:13:52,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-03-10 23:13:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-03-10 23:13:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:13:52,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,202 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:13:52,202 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2114235914, now seen corresponding path program 1 times [2021-03-10 23:13:52,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524051709] [2021-03-10 23:13:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:52,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524051709] [2021-03-10 23:13:52,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:52,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:13:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982980340] [2021-03-10 23:13:52,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:13:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:13:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:13:52,262 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,307 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-03-10 23:13:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:13:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 23:13:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,310 INFO L225 Difference]: With dead ends: 151 [2021-03-10 23:13:52,310 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 23:13:52,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 23:13:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-03-10 23:13:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-03-10 23:13:52,337 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-03-10 23:13:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,337 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-03-10 23:13:52,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-03-10 23:13:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:13:52,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,339 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:13:52,339 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1683683079, now seen corresponding path program 1 times [2021-03-10 23:13:52,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459250512] [2021-03-10 23:13:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459250512] [2021-03-10 23:13:52,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:52,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 23:13:52,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251116968] [2021-03-10 23:13:52,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:13:52,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:13:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:52,428 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,509 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-03-10 23:13:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:13:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 23:13:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,513 INFO L225 Difference]: With dead ends: 223 [2021-03-10 23:13:52,513 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 23:13:52,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:13:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 23:13:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-03-10 23:13:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-03-10 23:13:52,522 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-03-10 23:13:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,523 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-03-10 23:13:52,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-03-10 23:13:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:13:52,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,524 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:13:52,525 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash 71290013, now seen corresponding path program 1 times [2021-03-10 23:13:52,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477501124] [2021-03-10 23:13:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:13:52,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477501124] [2021-03-10 23:13:52,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:13:52,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 23:13:52,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457870685] [2021-03-10 23:13:52,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:13:52,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:13:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:13:52,577 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,612 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-03-10 23:13:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:13:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:13:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,615 INFO L225 Difference]: With dead ends: 344 [2021-03-10 23:13:52,615 INFO L226 Difference]: Without dead ends: 308 [2021-03-10 23:13:52,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:13:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-03-10 23:13:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-03-10 23:13:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-03-10 23:13:52,625 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-03-10 23:13:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,625 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-03-10 23:13:52,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-03-10 23:13:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:52,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,627 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 23:13:52,627 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1179461309, now seen corresponding path program 2 times [2021-03-10 23:13:52,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437757077] [2021-03-10 23:13:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:52,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437757077] [2021-03-10 23:13:52,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671330729] [2021-03-10 23:13:52,760 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 [2021-03-10 23:13:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:52,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:52,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:13:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:53,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:53,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 23:13:53,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036151619] [2021-03-10 23:13:53,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:13:53,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:53,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:13:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:13:53,132 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) 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) [2021-03-10 23:13:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:53,886 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-03-10 23:13:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:13:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) 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 30 [2021-03-10 23:13:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:53,890 INFO L225 Difference]: With dead ends: 545 [2021-03-10 23:13:53,890 INFO L226 Difference]: Without dead ends: 545 [2021-03-10 23:13:53,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:13:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-03-10 23:13:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-03-10 23:13:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-03-10 23:13:53,904 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-03-10 23:13:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-03-10 23:13:53,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) 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) [2021-03-10 23:13:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-03-10 23:13:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:53,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:53,906 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:54,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:54,112 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1066258745, now seen corresponding path program 3 times [2021-03-10 23:13:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:54,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480927019] [2021-03-10 23:13:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:54,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480927019] [2021-03-10 23:13:54,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56763312] [2021-03-10 23:13:54,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:54,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:13:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:13:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:54,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:54,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 23:13:54,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603386543] [2021-03-10 23:13:54,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:13:54,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:13:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:13:54,484 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) 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) [2021-03-10 23:13:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:55,305 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-03-10 23:13:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:13:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) 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 30 [2021-03-10 23:13:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:55,311 INFO L225 Difference]: With dead ends: 874 [2021-03-10 23:13:55,314 INFO L226 Difference]: Without dead ends: 874 [2021-03-10 23:13:55,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:13:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-03-10 23:13:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-03-10 23:13:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-03-10 23:13:55,332 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-03-10 23:13:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:55,334 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-03-10 23:13:55,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) 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) [2021-03-10 23:13:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-03-10 23:13:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:55,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:55,339 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:55,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 23:13:55,555 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash -887660733, now seen corresponding path program 4 times [2021-03-10 23:13:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:55,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767165972] [2021-03-10 23:13:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767165972] [2021-03-10 23:13:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281990509] [2021-03-10 23:13:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:55,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:55,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:13:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:55,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:55,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 23:13:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089126584] [2021-03-10 23:13:55,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:13:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:13:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:13:55,771 INFO L87 Difference]: Start difference. First operand 392 states and 1175 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:55,958 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-03-10 23:13:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:13:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 30 [2021-03-10 23:13:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:55,963 INFO L225 Difference]: With dead ends: 800 [2021-03-10 23:13:55,963 INFO L226 Difference]: Without dead ends: 800 [2021-03-10 23:13:55,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:13:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-03-10 23:13:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-03-10 23:13:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-03-10 23:13:55,980 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-03-10 23:13:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:55,980 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-03-10 23:13:55,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-03-10 23:13:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:55,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:55,982 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:56,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:13:56,206 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1202859447, now seen corresponding path program 5 times [2021-03-10 23:13:56,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:56,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145372373] [2021-03-10 23:13:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145372373] [2021-03-10 23:13:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138402719] [2021-03-10 23:13:56,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:56,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:13:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:13:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:56,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:56,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 23:13:56,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354593205] [2021-03-10 23:13:56,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:13:56,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:13:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:13:56,564 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:57,468 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-03-10 23:13:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:13:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:13:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:57,479 INFO L225 Difference]: With dead ends: 2062 [2021-03-10 23:13:57,479 INFO L226 Difference]: Without dead ends: 2062 [2021-03-10 23:13:57,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:13:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-03-10 23:13:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-03-10 23:13:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-03-10 23:13:57,538 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-03-10 23:13:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:57,539 INFO L480 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-03-10 23:13:57,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-03-10 23:13:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:57,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:57,543 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:57,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:57,747 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash -180076409, now seen corresponding path program 6 times [2021-03-10 23:13:57,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:57,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145734419] [2021-03-10 23:13:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:57,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145734419] [2021-03-10 23:13:57,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097637524] [2021-03-10 23:13:57,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:13:57,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:13:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:13:57,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:57,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:57,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 23:13:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281368484] [2021-03-10 23:13:57,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:13:57,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:13:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:13:57,936 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:58,121 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-03-10 23:13:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:13:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 30 [2021-03-10 23:13:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:58,131 INFO L225 Difference]: With dead ends: 1797 [2021-03-10 23:13:58,131 INFO L226 Difference]: Without dead ends: 1797 [2021-03-10 23:13:58,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:13:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-03-10 23:13:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-03-10 23:13:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-03-10 23:13:58,178 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-03-10 23:13:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:58,180 INFO L480 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-03-10 23:13:58,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-03-10 23:13:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:13:58,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:58,184 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:58,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:13:58,399 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1004171587, now seen corresponding path program 7 times [2021-03-10 23:13:58,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:58,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034728649] [2021-03-10 23:13:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034728649] [2021-03-10 23:13:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176528263] [2021-03-10 23:13:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:13:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:58,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:58,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 23:13:58,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566485479] [2021-03-10 23:13:58,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:13:58,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:13:58,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:13:58,568 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:58,728 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-03-10 23:13:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:13:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 30 [2021-03-10 23:13:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:58,741 INFO L225 Difference]: With dead ends: 2345 [2021-03-10 23:13:58,741 INFO L226 Difference]: Without dead ends: 2345 [2021-03-10 23:13:58,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:13:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-03-10 23:13:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-03-10 23:13:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-03-10 23:13:58,802 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-03-10 23:13:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:58,803 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-03-10 23:13:58,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-03-10 23:13:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-03-10 23:13:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:13:58,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:58,810 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:59,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:59,033 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:59,033 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-03-10 23:13:59,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:59,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432531064] [2021-03-10 23:13:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:59,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432531064] [2021-03-10 23:13:59,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766761898] [2021-03-10 23:13:59,128 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:59,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:13:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:13:59,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:59,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 23:13:59,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909779178] [2021-03-10 23:13:59,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:13:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:13:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:13:59,436 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-03-10 23:13:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:59,937 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-03-10 23:13:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:13:59,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 32 [2021-03-10 23:13:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:59,949 INFO L225 Difference]: With dead ends: 2383 [2021-03-10 23:13:59,949 INFO L226 Difference]: Without dead ends: 2383 [2021-03-10 23:13:59,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-03-10 23:14:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-03-10 23:14:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-03-10 23:14:00,013 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-03-10 23:14:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:00,014 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-03-10 23:14:00,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-03-10 23:14:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-03-10 23:14:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:14:00,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:00,019 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:00,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:00,245 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash 533920293, now seen corresponding path program 9 times [2021-03-10 23:14:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:00,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373165123] [2021-03-10 23:14:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:14:00,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373165123] [2021-03-10 23:14:00,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333444891] [2021-03-10 23:14:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:00,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:14:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:14:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:00,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:00,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 23:14:00,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202793216] [2021-03-10 23:14:00,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:14:00,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:00,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:14:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:14:00,528 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-03-10 23:14:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:01,230 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-03-10 23:14:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:14:01,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2021-03-10 23:14:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:01,251 INFO L225 Difference]: With dead ends: 3613 [2021-03-10 23:14:01,251 INFO L226 Difference]: Without dead ends: 3613 [2021-03-10 23:14:01,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:14:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-03-10 23:14:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-03-10 23:14:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-03-10 23:14:01,335 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-03-10 23:14:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:01,336 INFO L480 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-03-10 23:14:01,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-03-10 23:14:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-03-10 23:14:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:14:01,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:01,342 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:01,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:14:01,563 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 10 times [2021-03-10 23:14:01,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:01,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359073533] [2021-03-10 23:14:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:01,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359073533] [2021-03-10 23:14:01,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993994150] [2021-03-10 23:14:01,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:01,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:14:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:01,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:01,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-03-10 23:14:01,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109905080] [2021-03-10 23:14:01,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:14:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:14:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:14:01,825 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:02,207 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-03-10 23:14:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:14:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:14:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:02,225 INFO L225 Difference]: With dead ends: 4372 [2021-03-10 23:14:02,225 INFO L226 Difference]: Without dead ends: 4372 [2021-03-10 23:14:02,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:14:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-03-10 23:14:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-03-10 23:14:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-03-10 23:14:02,335 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-03-10 23:14:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:02,336 INFO L480 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-03-10 23:14:02,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-03-10 23:14:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:14:02,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:02,383 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:02,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:02,612 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2089630951, now seen corresponding path program 11 times [2021-03-10 23:14:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:02,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996258960] [2021-03-10 23:14:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:02,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996258960] [2021-03-10 23:14:02,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44852284] [2021-03-10 23:14:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:02,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:14:02,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:14:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:02,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:02,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 23:14:02,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8487311] [2021-03-10 23:14:02,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:14:02,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:14:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:14:02,970 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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) [2021-03-10 23:14:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:04,536 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-03-10 23:14:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:14:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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 [2021-03-10 23:14:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:04,561 INFO L225 Difference]: With dead ends: 9020 [2021-03-10 23:14:04,561 INFO L226 Difference]: Without dead ends: 9020 [2021-03-10 23:14:04,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1197.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 23:14:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-03-10 23:14:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-03-10 23:14:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-03-10 23:14:04,773 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-03-10 23:14:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:04,773 INFO L480 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-03-10 23:14:04,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 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) [2021-03-10 23:14:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-03-10 23:14:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:14:04,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:04,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:04,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:05,000 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash -379569387, now seen corresponding path program 12 times [2021-03-10 23:14:05,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:05,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205066644] [2021-03-10 23:14:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:05,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205066644] [2021-03-10 23:14:05,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062868956] [2021-03-10 23:14:05,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:05,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:14:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:14:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:05,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:05,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-03-10 23:14:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987818837] [2021-03-10 23:14:05,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:14:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:14:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:14:05,266 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:06,382 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-03-10 23:14:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:14:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:14:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:06,429 INFO L225 Difference]: With dead ends: 12646 [2021-03-10 23:14:06,429 INFO L226 Difference]: Without dead ends: 12646 [2021-03-10 23:14:06,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 772.2ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:14:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-03-10 23:14:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-03-10 23:14:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-03-10 23:14:06,749 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-03-10 23:14:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:06,749 INFO L480 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-03-10 23:14:06,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-03-10 23:14:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:14:06,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:06,764 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:06,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:14:06,979 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2122812367, now seen corresponding path program 13 times [2021-03-10 23:14:06,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:06,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784594845] [2021-03-10 23:14:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:14:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784594845] [2021-03-10 23:14:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761378746] [2021-03-10 23:14:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:14:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:14:07,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:07,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 23:14:07,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817536942] [2021-03-10 23:14:07,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:14:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:14:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:14:07,242 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:07,353 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-03-10 23:14:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:14:07,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:14:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:07,378 INFO L225 Difference]: With dead ends: 8397 [2021-03-10 23:14:07,379 INFO L226 Difference]: Without dead ends: 8397 [2021-03-10 23:14:07,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:14:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-03-10 23:14:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-03-10 23:14:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-03-10 23:14:07,572 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-03-10 23:14:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:07,573 INFO L480 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-03-10 23:14:07,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-03-10 23:14:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:07,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:07,592 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:07,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:14:07,807 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1254099961, now seen corresponding path program 14 times [2021-03-10 23:14:07,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:07,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139565302] [2021-03-10 23:14:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:14:08,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139565302] [2021-03-10 23:14:08,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914728869] [2021-03-10 23:14:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:08,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:08,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:14:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:08,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:08,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:14:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012236335] [2021-03-10 23:14:08,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:08,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:08,891 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:11,046 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-03-10 23:14:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:14:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:14:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:11,078 INFO L225 Difference]: With dead ends: 8244 [2021-03-10 23:14:11,078 INFO L226 Difference]: Without dead ends: 8170 [2021-03-10 23:14:11,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1670.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:14:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-03-10 23:14:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-03-10 23:14:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-03-10 23:14:11,286 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-03-10 23:14:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:11,286 INFO L480 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-03-10 23:14:11,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-03-10 23:14:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:11,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:11,298 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:11,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:14:11,511 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -695063545, now seen corresponding path program 15 times [2021-03-10 23:14:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:11,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516103480] [2021-03-10 23:14:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516103480] [2021-03-10 23:14:11,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562805573] [2021-03-10 23:14:11,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:11,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:14:11,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:14:11,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:12,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:12,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-03-10 23:14:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823569577] [2021-03-10 23:14:12,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:14:12,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:12,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:14:12,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:14:12,713 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:16,892 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-03-10 23:14:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 23:14:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 34 [2021-03-10 23:14:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:16,921 INFO L225 Difference]: With dead ends: 12070 [2021-03-10 23:14:16,921 INFO L226 Difference]: Without dead ends: 11996 [2021-03-10 23:14:16,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3271.2ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 23:14:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-03-10 23:14:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-03-10 23:14:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-03-10 23:14:17,184 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-03-10 23:14:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:17,184 INFO L480 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-03-10 23:14:17,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-03-10 23:14:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:17,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:17,197 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:17,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:17,411 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1711109379, now seen corresponding path program 16 times [2021-03-10 23:14:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:17,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113089860] [2021-03-10 23:14:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113089860] [2021-03-10 23:14:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281040468] [2021-03-10 23:14:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:17,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:14:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:18,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:18,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:14:18,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932354738] [2021-03-10 23:14:18,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:14:18,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:14:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:14:18,462 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:20,888 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-03-10 23:14:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 23:14:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:14:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:20,920 INFO L225 Difference]: With dead ends: 13107 [2021-03-10 23:14:20,920 INFO L226 Difference]: Without dead ends: 13046 [2021-03-10 23:14:20,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2262.6ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:14:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-03-10 23:14:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-03-10 23:14:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-03-10 23:14:21,242 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-03-10 23:14:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:21,242 INFO L480 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-03-10 23:14:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-03-10 23:14:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:21,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:21,255 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:21,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:21,471 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -316136445, now seen corresponding path program 17 times [2021-03-10 23:14:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:21,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638401520] [2021-03-10 23:14:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638401520] [2021-03-10 23:14:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772568221] [2021-03-10 23:14:21,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:21,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:14:21,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:14:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:22,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:22,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-03-10 23:14:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497840637] [2021-03-10 23:14:22,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:14:22,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:14:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:14:22,553 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:26,427 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-03-10 23:14:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:14:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 34 [2021-03-10 23:14:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:26,467 INFO L225 Difference]: With dead ends: 15153 [2021-03-10 23:14:26,467 INFO L226 Difference]: Without dead ends: 15073 [2021-03-10 23:14:26,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3193.1ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 23:14:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-03-10 23:14:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-03-10 23:14:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-03-10 23:14:26,758 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-03-10 23:14:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:26,758 INFO L480 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-03-10 23:14:26,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-03-10 23:14:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:26,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:26,772 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:26,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:26,994 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1006112687, now seen corresponding path program 18 times [2021-03-10 23:14:26,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:26,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137332848] [2021-03-10 23:14:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:27,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137332848] [2021-03-10 23:14:27,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157608752] [2021-03-10 23:14:27,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:27,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:14:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:27,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:14:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:28,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:28,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-03-10 23:14:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753049097] [2021-03-10 23:14:28,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:14:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:14:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:14:28,021 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:30,017 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-03-10 23:14:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:14:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 34 [2021-03-10 23:14:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:30,041 INFO L225 Difference]: With dead ends: 10976 [2021-03-10 23:14:30,041 INFO L226 Difference]: Without dead ends: 10902 [2021-03-10 23:14:30,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1597.2ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:14:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-03-10 23:14:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-03-10 23:14:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-03-10 23:14:30,258 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-03-10 23:14:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:30,258 INFO L480 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-03-10 23:14:30,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:14:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-03-10 23:14:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:30,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:30,278 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:30,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:30,483 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1609354065, now seen corresponding path program 19 times [2021-03-10 23:14:30,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:30,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269719842] [2021-03-10 23:14:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269719842] [2021-03-10 23:14:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608712407] [2021-03-10 23:14:30,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:14:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:31,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:31,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-03-10 23:14:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541368319] [2021-03-10 23:14:31,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:14:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:14:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:14:31,657 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2021-03-10 23:14:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:35,869 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-03-10 23:14:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 23:14:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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 34 [2021-03-10 23:14:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:35,898 INFO L225 Difference]: With dead ends: 14490 [2021-03-10 23:14:35,898 INFO L226 Difference]: Without dead ends: 14422 [2021-03-10 23:14:35,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 3502.7ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:14:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-03-10 23:14:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-03-10 23:14:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-03-10 23:14:36,108 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-03-10 23:14:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:36,109 INFO L480 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-03-10 23:14:36,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2021-03-10 23:14:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-03-10 23:14:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:36,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:36,126 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:36,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-10 23:14:36,334 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash -891786065, now seen corresponding path program 20 times [2021-03-10 23:14:36,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:36,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240706462] [2021-03-10 23:14:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:36,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240706462] [2021-03-10 23:14:36,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412782986] [2021-03-10 23:14:36,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:14:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:14:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:37,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:37,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-03-10 23:14:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734604250] [2021-03-10 23:14:37,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:14:37,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:14:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:14:37,444 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:42,304 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-03-10 23:14:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 23:14:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:14:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:42,334 INFO L225 Difference]: With dead ends: 16738 [2021-03-10 23:14:42,334 INFO L226 Difference]: Without dead ends: 16649 [2021-03-10 23:14:42,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 3888.3ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:14:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-03-10 23:14:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-03-10 23:14:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-03-10 23:14:42,540 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-03-10 23:14:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:42,541 INFO L480 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-03-10 23:14:42,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-03-10 23:14:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:42,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:42,550 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:42,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:42,755 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash 829796399, now seen corresponding path program 21 times [2021-03-10 23:14:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:42,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345150506] [2021-03-10 23:14:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:43,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345150506] [2021-03-10 23:14:43,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572958131] [2021-03-10 23:14:43,067 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 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 [2021-03-10 23:14:43,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:14:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:14:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:43,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:43,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:14:43,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085413592] [2021-03-10 23:14:43,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:43,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:43,760 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:46,608 INFO L93 Difference]: Finished difference Result 11033 states and 35856 transitions. [2021-03-10 23:14:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 23:14:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:14:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:46,628 INFO L225 Difference]: With dead ends: 11033 [2021-03-10 23:14:46,628 INFO L226 Difference]: Without dead ends: 10953 [2021-03-10 23:14:46,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2264.1ms TimeCoverageRelationStatistics Valid=822, Invalid=3870, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:14:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10953 states. [2021-03-10 23:14:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10953 to 7475. [2021-03-10 23:14:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.3433235215413433) internal successors, (24988), 7474 states have internal predecessors, (24988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 24988 transitions. [2021-03-10 23:14:46,789 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 24988 transitions. Word has length 34 [2021-03-10 23:14:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:46,789 INFO L480 AbstractCegarLoop]: Abstraction has 7475 states and 24988 transitions. [2021-03-10 23:14:46,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 24988 transitions. [2021-03-10 23:14:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:46,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:46,799 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:47,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 23:14:47,002 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1324004089, now seen corresponding path program 22 times [2021-03-10 23:14:47,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:47,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284652167] [2021-03-10 23:14:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:47,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284652167] [2021-03-10 23:14:47,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429702555] [2021-03-10 23:14:47,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:14:47,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:14:47,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:48,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:48,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:14:48,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93701081] [2021-03-10 23:14:48,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:48,054 INFO L87 Difference]: Start difference. First operand 7475 states and 24988 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:49,426 INFO L93 Difference]: Finished difference Result 9361 states and 30578 transitions. [2021-03-10 23:14:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:14:49,427 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:14:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:49,443 INFO L225 Difference]: With dead ends: 9361 [2021-03-10 23:14:49,443 INFO L226 Difference]: Without dead ends: 9293 [2021-03-10 23:14:49,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1321.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:14:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-03-10 23:14:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7505. [2021-03-10 23:14:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 7504 states have (on average 3.3443496801705757) internal successors, (25096), 7504 states have internal predecessors, (25096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 25096 transitions. [2021-03-10 23:14:49,588 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 25096 transitions. Word has length 34 [2021-03-10 23:14:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:49,588 INFO L480 AbstractCegarLoop]: Abstraction has 7505 states and 25096 transitions. [2021-03-10 23:14:49,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 25096 transitions. [2021-03-10 23:14:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:49,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:49,598 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:49,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 23:14:49,799 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -402301949, now seen corresponding path program 23 times [2021-03-10 23:14:49,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:49,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169573280] [2021-03-10 23:14:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169573280] [2021-03-10 23:14:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815653871] [2021-03-10 23:14:50,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:50,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:14:50,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:14:50,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:50,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:50,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:14:50,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666555078] [2021-03-10 23:14:50,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:50,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:50,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:50,707 INFO L87 Difference]: Start difference. First operand 7505 states and 25096 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:52,283 INFO L93 Difference]: Finished difference Result 10806 states and 35568 transitions. [2021-03-10 23:14:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:14:52,283 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:14:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:52,302 INFO L225 Difference]: With dead ends: 10806 [2021-03-10 23:14:52,303 INFO L226 Difference]: Without dead ends: 10726 [2021-03-10 23:14:52,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:14:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2021-03-10 23:14:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 7505. [2021-03-10 23:14:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 7504 states have (on average 3.3443496801705757) internal successors, (25096), 7504 states have internal predecessors, (25096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 25096 transitions. [2021-03-10 23:14:52,465 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 25096 transitions. Word has length 34 [2021-03-10 23:14:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:52,465 INFO L480 AbstractCegarLoop]: Abstraction has 7505 states and 25096 transitions. [2021-03-10 23:14:52,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:14:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 25096 transitions. [2021-03-10 23:14:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:52,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:52,475 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:52,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:52,675 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash -472411985, now seen corresponding path program 24 times [2021-03-10 23:14:52,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:52,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310485585] [2021-03-10 23:14:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310485585] [2021-03-10 23:14:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868817134] [2021-03-10 23:14:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:52,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:14:52,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:14:52,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:53,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:53,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:14:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324008308] [2021-03-10 23:14:53,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:14:53,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:14:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:53,681 INFO L87 Difference]: Start difference. First operand 7505 states and 25096 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:14:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:55,070 INFO L93 Difference]: Finished difference Result 10017 states and 33118 transitions. [2021-03-10 23:14:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:14:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:14:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:55,089 INFO L225 Difference]: With dead ends: 10017 [2021-03-10 23:14:55,089 INFO L226 Difference]: Without dead ends: 9937 [2021-03-10 23:14:55,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1390.9ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:14:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9937 states. [2021-03-10 23:14:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9937 to 7509. [2021-03-10 23:14:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7509 states, 7508 states have (on average 3.344166222695791) internal successors, (25108), 7508 states have internal predecessors, (25108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7509 states to 7509 states and 25108 transitions. [2021-03-10 23:14:55,238 INFO L78 Accepts]: Start accepts. Automaton has 7509 states and 25108 transitions. Word has length 34 [2021-03-10 23:14:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:55,239 INFO L480 AbstractCegarLoop]: Abstraction has 7509 states and 25108 transitions. [2021-03-10 23:14:55,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:14:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7509 states and 25108 transitions. [2021-03-10 23:14:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:55,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:55,248 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:55,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 23:14:55,449 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash 290892395, now seen corresponding path program 25 times [2021-03-10 23:14:55,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:55,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540939865] [2021-03-10 23:14:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:55,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540939865] [2021-03-10 23:14:55,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91185647] [2021-03-10 23:14:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:14:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:56,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:56,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:14:56,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701612821] [2021-03-10 23:14:56,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:14:56,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:14:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:14:56,582 INFO L87 Difference]: Start difference. First operand 7509 states and 25108 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:58,813 INFO L93 Difference]: Finished difference Result 11493 states and 37721 transitions. [2021-03-10 23:14:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:14:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:14:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:58,832 INFO L225 Difference]: With dead ends: 11493 [2021-03-10 23:14:58,832 INFO L226 Difference]: Without dead ends: 11419 [2021-03-10 23:14:58,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1983.7ms TimeCoverageRelationStatistics Valid=762, Invalid=2898, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:14:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11419 states. [2021-03-10 23:14:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11419 to 7599. [2021-03-10 23:14:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7599 states, 7598 states have (on average 3.3466701763622004) internal successors, (25428), 7598 states have internal predecessors, (25428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7599 states to 7599 states and 25428 transitions. [2021-03-10 23:14:58,985 INFO L78 Accepts]: Start accepts. Automaton has 7599 states and 25428 transitions. Word has length 34 [2021-03-10 23:14:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:58,985 INFO L480 AbstractCegarLoop]: Abstraction has 7599 states and 25428 transitions. [2021-03-10 23:14:58,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:14:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7599 states and 25428 transitions. [2021-03-10 23:14:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:14:58,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:58,995 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:59,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:59,211 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1008460395, now seen corresponding path program 26 times [2021-03-10 23:14:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:59,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721539144] [2021-03-10 23:14:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721539144] [2021-03-10 23:14:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517000647] [2021-03-10 23:14:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:14:59,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:14:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:00,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:00,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:15:00,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789929510] [2021-03-10 23:15:00,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:00,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:00,406 INFO L87 Difference]: Start difference. First operand 7599 states and 25428 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:02,561 INFO L93 Difference]: Finished difference Result 15482 states and 50488 transitions. [2021-03-10 23:15:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:15:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:02,593 INFO L225 Difference]: With dead ends: 15482 [2021-03-10 23:15:02,594 INFO L226 Difference]: Without dead ends: 15384 [2021-03-10 23:15:02,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1974.8ms TimeCoverageRelationStatistics Valid=646, Invalid=2434, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:15:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2021-03-10 23:15:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 7589. [2021-03-10 23:15:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.3450184501845017) internal successors, (25382), 7588 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25382 transitions. [2021-03-10 23:15:02,794 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25382 transitions. Word has length 34 [2021-03-10 23:15:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:02,794 INFO L480 AbstractCegarLoop]: Abstraction has 7589 states and 25382 transitions. [2021-03-10 23:15:02,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25382 transitions. [2021-03-10 23:15:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:02,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:02,806 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:03,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-03-10 23:15:03,007 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash -810749521, now seen corresponding path program 27 times [2021-03-10 23:15:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:03,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730623954] [2021-03-10 23:15:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:03,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730623954] [2021-03-10 23:15:03,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000293114] [2021-03-10 23:15:03,278 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 [2021-03-10 23:15:03,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:15:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:03,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:03,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:15:03,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001193651] [2021-03-10 23:15:03,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:15:03,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:15:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:15:03,988 INFO L87 Difference]: Start difference. First operand 7589 states and 25382 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:05,410 INFO L93 Difference]: Finished difference Result 10163 states and 33594 transitions. [2021-03-10 23:15:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:15:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:15:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:05,429 INFO L225 Difference]: With dead ends: 10163 [2021-03-10 23:15:05,429 INFO L226 Difference]: Without dead ends: 10083 [2021-03-10 23:15:05,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1332.7ms TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:15:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10083 states. [2021-03-10 23:15:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10083 to 7593. [2021-03-10 23:15:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 3.344836670179136) internal successors, (25394), 7592 states have internal predecessors, (25394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 25394 transitions. [2021-03-10 23:15:05,576 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 25394 transitions. Word has length 34 [2021-03-10 23:15:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:05,576 INFO L480 AbstractCegarLoop]: Abstraction has 7593 states and 25394 transitions. [2021-03-10 23:15:05,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 25394 transitions. [2021-03-10 23:15:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:05,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:05,591 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:05,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:05,814 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:05,814 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 28 times [2021-03-10 23:15:05,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:05,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371429408] [2021-03-10 23:15:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:06,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371429408] [2021-03-10 23:15:06,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379187228] [2021-03-10 23:15:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:06,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:06,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:06,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:06,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:15:06,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002013309] [2021-03-10 23:15:06,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:06,835 INFO L87 Difference]: Start difference. First operand 7593 states and 25394 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:08,139 INFO L93 Difference]: Finished difference Result 10125 states and 33490 transitions. [2021-03-10 23:15:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:15:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:08,158 INFO L225 Difference]: With dead ends: 10125 [2021-03-10 23:15:08,158 INFO L226 Difference]: Without dead ends: 10045 [2021-03-10 23:15:08,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1362.3ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:15:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10045 states. [2021-03-10 23:15:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10045 to 7593. [2021-03-10 23:15:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 3.344836670179136) internal successors, (25394), 7592 states have internal predecessors, (25394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 25394 transitions. [2021-03-10 23:15:08,310 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 25394 transitions. Word has length 34 [2021-03-10 23:15:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:08,310 INFO L480 AbstractCegarLoop]: Abstraction has 7593 states and 25394 transitions. [2021-03-10 23:15:08,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 25394 transitions. [2021-03-10 23:15:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:08,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:08,320 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:08,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-03-10 23:15:08,524 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1382765461, now seen corresponding path program 29 times [2021-03-10 23:15:08,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:08,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712552802] [2021-03-10 23:15:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712552802] [2021-03-10 23:15:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625640275] [2021-03-10 23:15:08,854 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 [2021-03-10 23:15:08,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:15:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:08,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:09,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:09,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:15:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598041202] [2021-03-10 23:15:09,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:15:09,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:15:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:15:09,673 INFO L87 Difference]: Start difference. First operand 7593 states and 25394 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:15:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:11,140 INFO L93 Difference]: Finished difference Result 9723 states and 31759 transitions. [2021-03-10 23:15:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:15:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:15:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:11,155 INFO L225 Difference]: With dead ends: 9723 [2021-03-10 23:15:11,155 INFO L226 Difference]: Without dead ends: 9655 [2021-03-10 23:15:11,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1480.7ms TimeCoverageRelationStatistics Valid=467, Invalid=1983, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:15:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2021-03-10 23:15:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 7687. [2021-03-10 23:15:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.345823575331772) internal successors, (25716), 7686 states have internal predecessors, (25716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 25716 transitions. [2021-03-10 23:15:11,290 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 25716 transitions. Word has length 34 [2021-03-10 23:15:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:11,290 INFO L480 AbstractCegarLoop]: Abstraction has 7687 states and 25716 transitions. [2021-03-10 23:15:11,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:15:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 25716 transitions. [2021-03-10 23:15:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:11,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:11,300 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:11,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:11,500 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -665197461, now seen corresponding path program 30 times [2021-03-10 23:15:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:11,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610901562] [2021-03-10 23:15:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610901562] [2021-03-10 23:15:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475148489] [2021-03-10 23:15:11,785 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 [2021-03-10 23:15:11,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:15:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:12,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:15:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94555252] [2021-03-10 23:15:12,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:12,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:12,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:12,503 INFO L87 Difference]: Start difference. First operand 7687 states and 25716 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:14,355 INFO L93 Difference]: Finished difference Result 12853 states and 41441 transitions. [2021-03-10 23:15:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:15:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:14,426 INFO L225 Difference]: With dead ends: 12853 [2021-03-10 23:15:14,427 INFO L226 Difference]: Without dead ends: 12755 [2021-03-10 23:15:14,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1697.9ms TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:15:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12755 states. [2021-03-10 23:15:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12755 to 7679. [2021-03-10 23:15:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.3446209950507946) internal successors, (25680), 7678 states have internal predecessors, (25680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 25680 transitions. [2021-03-10 23:15:14,584 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 25680 transitions. Word has length 34 [2021-03-10 23:15:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:14,584 INFO L480 AbstractCegarLoop]: Abstraction has 7679 states and 25680 transitions. [2021-03-10 23:15:14,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 25680 transitions. [2021-03-10 23:15:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:14,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:14,595 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:14,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-03-10 23:15:14,795 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 31 times [2021-03-10 23:15:14,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:14,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461762503] [2021-03-10 23:15:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461762503] [2021-03-10 23:15:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602185352] [2021-03-10 23:15:15,088 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 [2021-03-10 23:15:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:15,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:15,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:15:15,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333123901] [2021-03-10 23:15:15,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:15,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:15,865 INFO L87 Difference]: Start difference. First operand 7679 states and 25680 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:17,239 INFO L93 Difference]: Finished difference Result 9849 states and 32524 transitions. [2021-03-10 23:15:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:15:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:17,258 INFO L225 Difference]: With dead ends: 9849 [2021-03-10 23:15:17,259 INFO L226 Difference]: Without dead ends: 9769 [2021-03-10 23:15:17,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1430.2ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:15:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-03-10 23:15:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 7679. [2021-03-10 23:15:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.3446209950507946) internal successors, (25680), 7678 states have internal predecessors, (25680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 25680 transitions. [2021-03-10 23:15:17,458 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 25680 transitions. Word has length 34 [2021-03-10 23:15:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:17,458 INFO L480 AbstractCegarLoop]: Abstraction has 7679 states and 25680 transitions. [2021-03-10 23:15:17,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 25680 transitions. [2021-03-10 23:15:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:17,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:17,468 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:17,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:17,672 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1645184831, now seen corresponding path program 32 times [2021-03-10 23:15:17,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:17,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171433524] [2021-03-10 23:15:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:18,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171433524] [2021-03-10 23:15:18,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990668741] [2021-03-10 23:15:18,003 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 [2021-03-10 23:15:18,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:18,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:18,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:15:18,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85507902] [2021-03-10 23:15:18,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:18,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:18,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:18,657 INFO L87 Difference]: Start difference. First operand 7679 states and 25680 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:23,668 INFO L93 Difference]: Finished difference Result 14668 states and 47651 transitions. [2021-03-10 23:15:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 23:15:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:23,700 INFO L225 Difference]: With dead ends: 14668 [2021-03-10 23:15:23,700 INFO L226 Difference]: Without dead ends: 14588 [2021-03-10 23:15:23,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 3731.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=5676, Unknown=0, NotChecked=0, Total=6806 [2021-03-10 23:15:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14588 states. [2021-03-10 23:15:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14588 to 7977. [2021-03-10 23:15:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.342778335005015) internal successors, (26662), 7976 states have internal predecessors, (26662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 26662 transitions. [2021-03-10 23:15:23,905 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 26662 transitions. Word has length 34 [2021-03-10 23:15:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:23,905 INFO L480 AbstractCegarLoop]: Abstraction has 7977 states and 26662 transitions. [2021-03-10 23:15:23,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 26662 transitions. [2021-03-10 23:15:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:23,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:23,915 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:24,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-03-10 23:15:24,116 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash -508615657, now seen corresponding path program 33 times [2021-03-10 23:15:24,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:24,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269632512] [2021-03-10 23:15:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:24,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269632512] [2021-03-10 23:15:24,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209076782] [2021-03-10 23:15:24,475 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 [2021-03-10 23:15:24,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:15:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:25,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:15:25,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30375609] [2021-03-10 23:15:25,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:15:25,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:25,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:15:25,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:15:25,284 INFO L87 Difference]: Start difference. First operand 7977 states and 26662 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:27,486 INFO L93 Difference]: Finished difference Result 10641 states and 34739 transitions. [2021-03-10 23:15:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:15:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:15:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:27,507 INFO L225 Difference]: With dead ends: 10641 [2021-03-10 23:15:27,508 INFO L226 Difference]: Without dead ends: 10567 [2021-03-10 23:15:27,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1793.5ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:15:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-03-10 23:15:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 8046. [2021-03-10 23:15:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8046 states, 8045 states have (on average 3.345183343691734) internal successors, (26912), 8045 states have internal predecessors, (26912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 26912 transitions. [2021-03-10 23:15:27,673 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 26912 transitions. Word has length 34 [2021-03-10 23:15:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:27,673 INFO L480 AbstractCegarLoop]: Abstraction has 8046 states and 26912 transitions. [2021-03-10 23:15:27,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 26912 transitions. [2021-03-10 23:15:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:27,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:27,683 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:27,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-03-10 23:15:27,884 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 342976447, now seen corresponding path program 34 times [2021-03-10 23:15:27,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:27,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957002084] [2021-03-10 23:15:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957002084] [2021-03-10 23:15:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794308651] [2021-03-10 23:15:28,221 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 [2021-03-10 23:15:28,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:28,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:28,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:29,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:15:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869651260] [2021-03-10 23:15:29,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:29,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:29,107 INFO L87 Difference]: Start difference. First operand 8046 states and 26912 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:30,811 INFO L93 Difference]: Finished difference Result 11822 states and 39082 transitions. [2021-03-10 23:15:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:15:30,812 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:30,835 INFO L225 Difference]: With dead ends: 11822 [2021-03-10 23:15:30,836 INFO L226 Difference]: Without dead ends: 11742 [2021-03-10 23:15:30,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1790.7ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:15:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11742 states. [2021-03-10 23:15:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11742 to 8050. [2021-03-10 23:15:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8049 states have (on average 3.345011802708411) internal successors, (26924), 8049 states have internal predecessors, (26924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 26924 transitions. [2021-03-10 23:15:31,015 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 26924 transitions. Word has length 34 [2021-03-10 23:15:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:31,015 INFO L480 AbstractCegarLoop]: Abstraction has 8050 states and 26924 transitions. [2021-03-10 23:15:31,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 26924 transitions. [2021-03-10 23:15:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:31,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:31,026 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:31,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:31,239 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1106280827, now seen corresponding path program 35 times [2021-03-10 23:15:31,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:31,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295287394] [2021-03-10 23:15:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295287394] [2021-03-10 23:15:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413524865] [2021-03-10 23:15:31,599 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 [2021-03-10 23:15:31,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:15:31,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:15:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223444992] [2021-03-10 23:15:32,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:15:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:15:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:15:32,662 INFO L87 Difference]: Start difference. First operand 8050 states and 26924 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:15:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:35,413 INFO L93 Difference]: Finished difference Result 13492 states and 44421 transitions. [2021-03-10 23:15:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:15:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:15:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:35,441 INFO L225 Difference]: With dead ends: 13492 [2021-03-10 23:15:35,442 INFO L226 Difference]: Without dead ends: 13418 [2021-03-10 23:15:35,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2500.3ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:15:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13418 states. [2021-03-10 23:15:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13418 to 8308. [2021-03-10 23:15:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8308 states, 8307 states have (on average 3.348742024798363) internal successors, (27818), 8307 states have internal predecessors, (27818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8308 states to 8308 states and 27818 transitions. [2021-03-10 23:15:35,694 INFO L78 Accepts]: Start accepts. Automaton has 8308 states and 27818 transitions. Word has length 34 [2021-03-10 23:15:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:35,694 INFO L480 AbstractCegarLoop]: Abstraction has 8308 states and 27818 transitions. [2021-03-10 23:15:35,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:15:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8308 states and 27818 transitions. [2021-03-10 23:15:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:35,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:35,704 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:35,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-03-10 23:15:35,905 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1823848827, now seen corresponding path program 36 times [2021-03-10 23:15:35,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:35,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022791619] [2021-03-10 23:15:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:36,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022791619] [2021-03-10 23:15:36,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695785520] [2021-03-10 23:15:36,317 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 [2021-03-10 23:15:36,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:15:36,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:36,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:36,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:37,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:37,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:15:37,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18714075] [2021-03-10 23:15:37,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:37,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:37,186 INFO L87 Difference]: Start difference. First operand 8308 states and 27818 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:39,826 INFO L93 Difference]: Finished difference Result 17482 states and 57159 transitions. [2021-03-10 23:15:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:15:39,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:39,864 INFO L225 Difference]: With dead ends: 17482 [2021-03-10 23:15:39,864 INFO L226 Difference]: Without dead ends: 17384 [2021-03-10 23:15:39,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2226.8ms TimeCoverageRelationStatistics Valid=610, Invalid=2470, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:15:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17384 states. [2021-03-10 23:15:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17384 to 8148. [2021-03-10 23:15:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8148 states, 8147 states have (on average 3.343807536516509) internal successors, (27242), 8147 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 27242 transitions. [2021-03-10 23:15:40,166 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 27242 transitions. Word has length 34 [2021-03-10 23:15:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:40,166 INFO L480 AbstractCegarLoop]: Abstraction has 8148 states and 27242 transitions. [2021-03-10 23:15:40,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 27242 transitions. [2021-03-10 23:15:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:40,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:40,178 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:40,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:40,378 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 4638911, now seen corresponding path program 37 times [2021-03-10 23:15:40,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:40,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226405257] [2021-03-10 23:15:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:40,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226405257] [2021-03-10 23:15:40,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789682602] [2021-03-10 23:15:40,778 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 [2021-03-10 23:15:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:40,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:41,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:41,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:15:41,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684202029] [2021-03-10 23:15:41,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:41,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:41,726 INFO L87 Difference]: Start difference. First operand 8148 states and 27242 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:43,711 INFO L93 Difference]: Finished difference Result 11574 states and 38238 transitions. [2021-03-10 23:15:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:15:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:43,734 INFO L225 Difference]: With dead ends: 11574 [2021-03-10 23:15:43,734 INFO L226 Difference]: Without dead ends: 11494 [2021-03-10 23:15:43,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1917.1ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:15:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-03-10 23:15:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 8136. [2021-03-10 23:15:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8136 states, 8135 states have (on average 3.3443146896127844) internal successors, (27206), 8135 states have internal predecessors, (27206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8136 states to 8136 states and 27206 transitions. [2021-03-10 23:15:43,909 INFO L78 Accepts]: Start accepts. Automaton has 8136 states and 27206 transitions. Word has length 34 [2021-03-10 23:15:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:43,909 INFO L480 AbstractCegarLoop]: Abstraction has 8136 states and 27206 transitions. [2021-03-10 23:15:43,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 8136 states and 27206 transitions. [2021-03-10 23:15:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:43,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:43,919 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:44,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-03-10 23:15:44,120 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash 809080239, now seen corresponding path program 38 times [2021-03-10 23:15:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:44,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597083024] [2021-03-10 23:15:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:44,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597083024] [2021-03-10 23:15:44,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598239910] [2021-03-10 23:15:44,497 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 [2021-03-10 23:15:44,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:44,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:44,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:15:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:45,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:45,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:15:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718464040] [2021-03-10 23:15:45,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:45,297 INFO L87 Difference]: Start difference. First operand 8136 states and 27206 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:50,075 INFO L93 Difference]: Finished difference Result 11755 states and 38275 transitions. [2021-03-10 23:15:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:15:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:50,099 INFO L225 Difference]: With dead ends: 11755 [2021-03-10 23:15:50,099 INFO L226 Difference]: Without dead ends: 11688 [2021-03-10 23:15:50,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 3767.1ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:15:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2021-03-10 23:15:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 8328. [2021-03-10 23:15:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 8327 states have (on average 3.344782034346103) internal successors, (27852), 8327 states have internal predecessors, (27852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 27852 transitions. [2021-03-10 23:15:50,317 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 27852 transitions. Word has length 34 [2021-03-10 23:15:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:50,318 INFO L480 AbstractCegarLoop]: Abstraction has 8328 states and 27852 transitions. [2021-03-10 23:15:50,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 27852 transitions. [2021-03-10 23:15:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:50,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:50,329 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:50,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-03-10 23:15:50,529 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1344720249, now seen corresponding path program 39 times [2021-03-10 23:15:50,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:50,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434610373] [2021-03-10 23:15:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:50,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434610373] [2021-03-10 23:15:50,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804684411] [2021-03-10 23:15:50,930 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 [2021-03-10 23:15:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:15:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:51,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:51,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:15:51,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957586340] [2021-03-10 23:15:51,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:15:51,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:15:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:15:51,778 INFO L87 Difference]: Start difference. First operand 8328 states and 27852 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:55,267 INFO L93 Difference]: Finished difference Result 11638 states and 38170 transitions. [2021-03-10 23:15:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:15:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:15:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:55,292 INFO L225 Difference]: With dead ends: 11638 [2021-03-10 23:15:55,292 INFO L226 Difference]: Without dead ends: 11564 [2021-03-10 23:15:55,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2817.3ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:15:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11564 states. [2021-03-10 23:15:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11564 to 8364. [2021-03-10 23:15:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 8363 states have (on average 3.3461676431902427) internal successors, (27984), 8363 states have internal predecessors, (27984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 27984 transitions. [2021-03-10 23:15:55,466 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 27984 transitions. Word has length 34 [2021-03-10 23:15:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:55,466 INFO L480 AbstractCegarLoop]: Abstraction has 8364 states and 27984 transitions. [2021-03-10 23:15:55,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:15:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 27984 transitions. [2021-03-10 23:15:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:15:55,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:55,478 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:55,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:55,679 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -493128145, now seen corresponding path program 40 times [2021-03-10 23:15:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:55,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125359497] [2021-03-10 23:15:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:56,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125359497] [2021-03-10 23:15:56,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949176987] [2021-03-10 23:15:56,232 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 [2021-03-10 23:15:56,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:15:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:57,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:57,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:15:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628376761] [2021-03-10 23:15:57,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:15:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:15:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:15:57,343 INFO L87 Difference]: Start difference. First operand 8364 states and 27984 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:15:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:59,967 INFO L93 Difference]: Finished difference Result 13018 states and 42528 transitions. [2021-03-10 23:15:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:15:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:15:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:59,996 INFO L225 Difference]: With dead ends: 13018 [2021-03-10 23:15:59,996 INFO L226 Difference]: Without dead ends: 12938 [2021-03-10 23:15:59,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2602.0ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:16:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12938 states. [2021-03-10 23:16:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12938 to 8366. [2021-03-10 23:16:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8366 states, 8365 states have (on average 3.3460848774656307) internal successors, (27990), 8365 states have internal predecessors, (27990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8366 states to 8366 states and 27990 transitions. [2021-03-10 23:16:00,282 INFO L78 Accepts]: Start accepts. Automaton has 8366 states and 27990 transitions. Word has length 34 [2021-03-10 23:16:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:00,283 INFO L480 AbstractCegarLoop]: Abstraction has 8366 states and 27990 transitions. [2021-03-10 23:16:00,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8366 states and 27990 transitions. [2021-03-10 23:16:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:00,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:00,296 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:00,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-03-10 23:16:00,497 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash 270176235, now seen corresponding path program 41 times [2021-03-10 23:16:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263438995] [2021-03-10 23:16:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263438995] [2021-03-10 23:16:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099347065] [2021-03-10 23:16:01,024 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 [2021-03-10 23:16:01,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:16:01,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:16:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:02,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:02,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:16:02,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121010333] [2021-03-10 23:16:02,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:16:02,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:16:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:16:02,091 INFO L87 Difference]: Start difference. First operand 8366 states and 27990 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:16:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:06,610 INFO L93 Difference]: Finished difference Result 13642 states and 44089 transitions. [2021-03-10 23:16:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:16:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:16:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:06,643 INFO L225 Difference]: With dead ends: 13642 [2021-03-10 23:16:06,643 INFO L226 Difference]: Without dead ends: 13574 [2021-03-10 23:16:06,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3883.9ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:16:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13574 states. [2021-03-10 23:16:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13574 to 8868. [2021-03-10 23:16:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 3.339348144806586) internal successors, (29610), 8867 states have internal predecessors, (29610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 29610 transitions. [2021-03-10 23:16:06,860 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 29610 transitions. Word has length 34 [2021-03-10 23:16:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:06,860 INFO L480 AbstractCegarLoop]: Abstraction has 8868 states and 29610 transitions. [2021-03-10 23:16:06,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:16:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 29610 transitions. [2021-03-10 23:16:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:06,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:06,872 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:07,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:07,073 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 987744235, now seen corresponding path program 42 times [2021-03-10 23:16:07,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:07,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322214118] [2021-03-10 23:16:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322214118] [2021-03-10 23:16:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570201665] [2021-03-10 23:16:07,625 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 [2021-03-10 23:16:07,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:16:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:16:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:08,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:08,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:16:08,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663008329] [2021-03-10 23:16:08,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:16:08,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:16:08,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:16:08,644 INFO L87 Difference]: Start difference. First operand 8868 states and 29610 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:12,215 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:16:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:12,473 INFO L93 Difference]: Finished difference Result 17385 states and 56515 transitions. [2021-03-10 23:16:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:16:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:16:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:12,513 INFO L225 Difference]: With dead ends: 17385 [2021-03-10 23:16:12,513 INFO L226 Difference]: Without dead ends: 17287 [2021-03-10 23:16:12,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 3085.8ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:16:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17287 states. [2021-03-10 23:16:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17287 to 8868. [2021-03-10 23:16:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 3.339348144806586) internal successors, (29610), 8867 states have internal predecessors, (29610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 29610 transitions. [2021-03-10 23:16:12,744 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 29610 transitions. Word has length 34 [2021-03-10 23:16:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:12,744 INFO L480 AbstractCegarLoop]: Abstraction has 8868 states and 29610 transitions. [2021-03-10 23:16:12,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 29610 transitions. [2021-03-10 23:16:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:12,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:12,756 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:12,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-03-10 23:16:12,957 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -831465681, now seen corresponding path program 43 times [2021-03-10 23:16:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:12,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686611605] [2021-03-10 23:16:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686611605] [2021-03-10 23:16:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357873790] [2021-03-10 23:16:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:16:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:14,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:14,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:16:14,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613739870] [2021-03-10 23:16:14,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:16:14,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:16:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:16:14,150 INFO L87 Difference]: Start difference. First operand 8868 states and 29610 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:16,903 INFO L93 Difference]: Finished difference Result 14456 states and 47084 transitions. [2021-03-10 23:16:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:16:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:16:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:16,934 INFO L225 Difference]: With dead ends: 14456 [2021-03-10 23:16:16,934 INFO L226 Difference]: Without dead ends: 14376 [2021-03-10 23:16:16,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2263.9ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:16:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14376 states. [2021-03-10 23:16:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14376 to 8876. [2021-03-10 23:16:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8875 states have (on average 3.339042253521127) internal successors, (29634), 8875 states have internal predecessors, (29634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 29634 transitions. [2021-03-10 23:16:17,201 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 29634 transitions. Word has length 34 [2021-03-10 23:16:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:17,202 INFO L480 AbstractCegarLoop]: Abstraction has 8876 states and 29634 transitions. [2021-03-10 23:16:17,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 29634 transitions. [2021-03-10 23:16:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:17,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:17,214 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:17,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:17,415 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -743901889, now seen corresponding path program 44 times [2021-03-10 23:16:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:17,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141868453] [2021-03-10 23:16:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:17,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141868453] [2021-03-10 23:16:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405867093] [2021-03-10 23:16:17,974 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 [2021-03-10 23:16:18,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:16:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:16:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:19,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:19,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:16:19,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136111823] [2021-03-10 23:16:19,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:16:19,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:16:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:16:19,033 INFO L87 Difference]: Start difference. First operand 8876 states and 29634 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:23,653 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:16:25,749 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 23:16:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:25,909 INFO L93 Difference]: Finished difference Result 16051 states and 51704 transitions. [2021-03-10 23:16:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:16:25,910 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:16:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:25,944 INFO L225 Difference]: With dead ends: 16051 [2021-03-10 23:16:25,944 INFO L226 Difference]: Without dead ends: 15971 [2021-03-10 23:16:25,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 5306.6ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:16:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15971 states. [2021-03-10 23:16:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15971 to 9266. [2021-03-10 23:16:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9266 states, 9265 states have (on average 3.3508904479222883) internal successors, (31046), 9265 states have internal predecessors, (31046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9266 states to 9266 states and 31046 transitions. [2021-03-10 23:16:26,183 INFO L78 Accepts]: Start accepts. Automaton has 9266 states and 31046 transitions. Word has length 34 [2021-03-10 23:16:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:26,183 INFO L480 AbstractCegarLoop]: Abstraction has 9266 states and 31046 transitions. [2021-03-10 23:16:26,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9266 states and 31046 transitions. [2021-03-10 23:16:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:26,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:26,196 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:26,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:26,396 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1130059071, now seen corresponding path program 45 times [2021-03-10 23:16:26,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:26,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138674841] [2021-03-10 23:16:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:26,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138674841] [2021-03-10 23:16:26,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110071347] [2021-03-10 23:16:26,871 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 [2021-03-10 23:16:26,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:16:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:26,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:16:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:27,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:16:27,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224537058] [2021-03-10 23:16:27,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:16:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:16:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:16:27,931 INFO L87 Difference]: Start difference. First operand 9266 states and 31046 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:31,552 INFO L93 Difference]: Finished difference Result 16209 states and 53247 transitions. [2021-03-10 23:16:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:16:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:16:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:31,593 INFO L225 Difference]: With dead ends: 16209 [2021-03-10 23:16:31,594 INFO L226 Difference]: Without dead ends: 16129 [2021-03-10 23:16:31,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3046.6ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:16:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16129 states. [2021-03-10 23:16:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16129 to 9348. [2021-03-10 23:16:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9348 states, 9347 states have (on average 3.353803359366642) internal successors, (31348), 9347 states have internal predecessors, (31348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9348 states to 9348 states and 31348 transitions. [2021-03-10 23:16:31,848 INFO L78 Accepts]: Start accepts. Automaton has 9348 states and 31348 transitions. Word has length 34 [2021-03-10 23:16:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:31,848 INFO L480 AbstractCegarLoop]: Abstraction has 9348 states and 31348 transitions. [2021-03-10 23:16:31,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 9348 states and 31348 transitions. [2021-03-10 23:16:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:31,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:31,862 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:32,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-03-10 23:16:32,063 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 46 times [2021-03-10 23:16:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:32,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456702047] [2021-03-10 23:16:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456702047] [2021-03-10 23:16:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171617633] [2021-03-10 23:16:32,533 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 [2021-03-10 23:16:32,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:16:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:32,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:16:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:33,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:33,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-03-10 23:16:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784165066] [2021-03-10 23:16:33,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:16:33,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:16:33,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:16:33,754 INFO L87 Difference]: Start difference. First operand 9348 states and 31348 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:16:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:36,599 INFO L93 Difference]: Finished difference Result 14579 states and 47537 transitions. [2021-03-10 23:16:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:16:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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 34 [2021-03-10 23:16:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:36,637 INFO L225 Difference]: With dead ends: 14579 [2021-03-10 23:16:36,637 INFO L226 Difference]: Without dead ends: 14518 [2021-03-10 23:16:36,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2604.0ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:16:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14518 states. [2021-03-10 23:16:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14518 to 9438. [2021-03-10 23:16:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9438 states, 9437 states have (on average 3.3555155240012717) internal successors, (31666), 9437 states have internal predecessors, (31666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9438 states to 9438 states and 31666 transitions. [2021-03-10 23:16:36,885 INFO L78 Accepts]: Start accepts. Automaton has 9438 states and 31666 transitions. Word has length 34 [2021-03-10 23:16:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:36,885 INFO L480 AbstractCegarLoop]: Abstraction has 9438 states and 31666 transitions. [2021-03-10 23:16:36,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2021-03-10 23:16:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 9438 states and 31666 transitions. [2021-03-10 23:16:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:36,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:36,898 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:37,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:37,099 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 47 times [2021-03-10 23:16:37,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:37,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220872102] [2021-03-10 23:16:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220872102] [2021-03-10 23:16:37,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765457988] [2021-03-10 23:16:37,605 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 [2021-03-10 23:16:37,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:16:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:16:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:38,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:38,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-03-10 23:16:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344980886] [2021-03-10 23:16:38,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:16:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:38,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:16:38,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:16:38,801 INFO L87 Difference]: Start difference. First operand 9438 states and 31666 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:16:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:44,041 INFO L93 Difference]: Finished difference Result 19549 states and 64461 transitions. [2021-03-10 23:16:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:16:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 34 [2021-03-10 23:16:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:44,091 INFO L225 Difference]: With dead ends: 19549 [2021-03-10 23:16:44,091 INFO L226 Difference]: Without dead ends: 19469 [2021-03-10 23:16:44,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 3991.0ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:16:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19469 states. [2021-03-10 23:16:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19469 to 9405. [2021-03-10 23:16:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 3.353891960867716) internal successors, (31540), 9404 states have internal predecessors, (31540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 31540 transitions. [2021-03-10 23:16:44,376 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 31540 transitions. Word has length 34 [2021-03-10 23:16:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:44,377 INFO L480 AbstractCegarLoop]: Abstraction has 9405 states and 31540 transitions. [2021-03-10 23:16:44,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-03-10 23:16:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 31540 transitions. [2021-03-10 23:16:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:44,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:44,391 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:44,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-03-10 23:16:44,592 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 48 times [2021-03-10 23:16:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:44,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988131766] [2021-03-10 23:16:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:45,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988131766] [2021-03-10 23:16:45,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467953719] [2021-03-10 23:16:45,273 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 [2021-03-10 23:16:45,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:16:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:16:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:46,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:46,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:16:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693272264] [2021-03-10 23:16:46,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:16:46,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:16:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:16:46,490 INFO L87 Difference]: Start difference. First operand 9405 states and 31540 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:49,612 INFO L93 Difference]: Finished difference Result 13161 states and 43832 transitions. [2021-03-10 23:16:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:16:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:16:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:49,649 INFO L225 Difference]: With dead ends: 13161 [2021-03-10 23:16:49,649 INFO L226 Difference]: Without dead ends: 13081 [2021-03-10 23:16:49,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2802.7ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:16:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2021-03-10 23:16:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 9413. [2021-03-10 23:16:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9413 states, 9412 states have (on average 3.3535911602209945) internal successors, (31564), 9412 states have internal predecessors, (31564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9413 states to 9413 states and 31564 transitions. [2021-03-10 23:16:49,875 INFO L78 Accepts]: Start accepts. Automaton has 9413 states and 31564 transitions. Word has length 34 [2021-03-10 23:16:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:49,875 INFO L480 AbstractCegarLoop]: Abstraction has 9413 states and 31564 transitions. [2021-03-10 23:16:49,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:16:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9413 states and 31564 transitions. [2021-03-10 23:16:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:49,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:49,891 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:50,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:50,092 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 49 times [2021-03-10 23:16:50,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:50,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310464176] [2021-03-10 23:16:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310464176] [2021-03-10 23:16:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157811336] [2021-03-10 23:16:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:16:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:16:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:51,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:51,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:16:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945829748] [2021-03-10 23:16:51,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:16:51,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:16:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:16:51,774 INFO L87 Difference]: Start difference. First operand 9413 states and 31564 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:54,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:54,617 INFO L93 Difference]: Finished difference Result 13167 states and 43886 transitions. [2021-03-10 23:16:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:16:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:16:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:54,653 INFO L225 Difference]: With dead ends: 13167 [2021-03-10 23:16:54,653 INFO L226 Difference]: Without dead ends: 13087 [2021-03-10 23:16:54,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2316.0ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:16:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13087 states. [2021-03-10 23:16:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13087 to 9415. [2021-03-10 23:16:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 9414 states have (on average 3.353516039940514) internal successors, (31570), 9414 states have internal predecessors, (31570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 31570 transitions. [2021-03-10 23:16:54,884 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 31570 transitions. Word has length 34 [2021-03-10 23:16:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:54,884 INFO L480 AbstractCegarLoop]: Abstraction has 9415 states and 31570 transitions. [2021-03-10 23:16:54,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:16:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 31570 transitions. [2021-03-10 23:16:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:16:54,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:54,900 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:55,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-03-10 23:16:55,101 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 50 times [2021-03-10 23:16:55,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:55,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466336935] [2021-03-10 23:16:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:55,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466336935] [2021-03-10 23:16:55,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526729068] [2021-03-10 23:16:55,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:16:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:16:55,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:56,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:56,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:16:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741485250] [2021-03-10 23:16:56,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:16:56,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:16:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:16:56,813 INFO L87 Difference]: Start difference. First operand 9415 states and 31570 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:17:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:00,091 INFO L93 Difference]: Finished difference Result 13055 states and 43482 transitions. [2021-03-10 23:17:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:17:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:17:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:00,131 INFO L225 Difference]: With dead ends: 13055 [2021-03-10 23:17:00,131 INFO L226 Difference]: Without dead ends: 12975 [2021-03-10 23:17:00,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2764.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:17:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-03-10 23:17:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 9359. [2021-03-10 23:17:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9359 states, 9358 states have (on average 3.353708057277196) internal successors, (31384), 9358 states have internal predecessors, (31384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9359 states to 9359 states and 31384 transitions. [2021-03-10 23:17:00,356 INFO L78 Accepts]: Start accepts. Automaton has 9359 states and 31384 transitions. Word has length 34 [2021-03-10 23:17:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:00,356 INFO L480 AbstractCegarLoop]: Abstraction has 9359 states and 31384 transitions. [2021-03-10 23:17:00,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:17:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9359 states and 31384 transitions. [2021-03-10 23:17:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:00,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:00,373 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:00,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-03-10 23:17:00,574 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 51 times [2021-03-10 23:17:00,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:00,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120672443] [2021-03-10 23:17:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:01,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120672443] [2021-03-10 23:17:01,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987514352] [2021-03-10 23:17:01,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:01,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:17:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:17:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:02,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:02,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:17:02,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206924116] [2021-03-10 23:17:02,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:17:02,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:02,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:17:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:17:02,638 INFO L87 Difference]: Start difference. First operand 9359 states and 31384 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:07,578 INFO L93 Difference]: Finished difference Result 16910 states and 55060 transitions. [2021-03-10 23:17:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:17:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:17:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:07,621 INFO L225 Difference]: With dead ends: 16910 [2021-03-10 23:17:07,621 INFO L226 Difference]: Without dead ends: 16836 [2021-03-10 23:17:07,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 3707.9ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:17:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16836 states. [2021-03-10 23:17:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16836 to 9543. [2021-03-10 23:17:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9543 states, 9542 states have (on average 3.3579962272060366) internal successors, (32042), 9542 states have internal predecessors, (32042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9543 states to 9543 states and 32042 transitions. [2021-03-10 23:17:07,902 INFO L78 Accepts]: Start accepts. Automaton has 9543 states and 32042 transitions. Word has length 34 [2021-03-10 23:17:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:07,902 INFO L480 AbstractCegarLoop]: Abstraction has 9543 states and 32042 transitions. [2021-03-10 23:17:07,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 9543 states and 32042 transitions. [2021-03-10 23:17:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:07,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:07,917 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:08,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:08,118 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -115508009, now seen corresponding path program 52 times [2021-03-10 23:17:08,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:08,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245790704] [2021-03-10 23:17:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245790704] [2021-03-10 23:17:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808736376] [2021-03-10 23:17:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:08,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:17:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:17:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:10,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:10,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:17:10,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688006856] [2021-03-10 23:17:10,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:17:10,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:17:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:17:10,123 INFO L87 Difference]: Start difference. First operand 9543 states and 32042 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:14,395 INFO L93 Difference]: Finished difference Result 16427 states and 54362 transitions. [2021-03-10 23:17:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:17:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:17:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:14,442 INFO L225 Difference]: With dead ends: 16427 [2021-03-10 23:17:14,443 INFO L226 Difference]: Without dead ends: 16347 [2021-03-10 23:17:14,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 3077.7ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:17:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16347 states. [2021-03-10 23:17:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16347 to 9547. [2021-03-10 23:17:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 9546 states have (on average 3.3578462183113347) internal successors, (32054), 9546 states have internal predecessors, (32054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 32054 transitions. [2021-03-10 23:17:14,715 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 32054 transitions. Word has length 34 [2021-03-10 23:17:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:14,716 INFO L480 AbstractCegarLoop]: Abstraction has 9547 states and 32054 transitions. [2021-03-10 23:17:14,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 32054 transitions. [2021-03-10 23:17:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:14,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:14,732 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:14,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-03-10 23:17:14,932 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 53 times [2021-03-10 23:17:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:14,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220725884] [2021-03-10 23:17:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:15,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220725884] [2021-03-10 23:17:15,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27823408] [2021-03-10 23:17:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:15,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:17:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:17:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:17,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:17,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:17:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696216315] [2021-03-10 23:17:17,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:17:17,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:17:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:17:17,044 INFO L87 Difference]: Start difference. First operand 9547 states and 32054 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:21,729 INFO L93 Difference]: Finished difference Result 15525 states and 51610 transitions. [2021-03-10 23:17:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:17:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:17:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:21,772 INFO L225 Difference]: With dead ends: 15525 [2021-03-10 23:17:21,773 INFO L226 Difference]: Without dead ends: 15445 [2021-03-10 23:17:21,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 3491.7ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:17:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15445 states. [2021-03-10 23:17:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15445 to 9547. [2021-03-10 23:17:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 9546 states have (on average 3.3578462183113347) internal successors, (32054), 9546 states have internal predecessors, (32054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 32054 transitions. [2021-03-10 23:17:22,035 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 32054 transitions. Word has length 34 [2021-03-10 23:17:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:22,035 INFO L480 AbstractCegarLoop]: Abstraction has 9547 states and 32054 transitions. [2021-03-10 23:17:22,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 32054 transitions. [2021-03-10 23:17:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:22,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:22,051 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:22,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:22,252 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1295254335, now seen corresponding path program 54 times [2021-03-10 23:17:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:22,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553450369] [2021-03-10 23:17:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:22,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553450369] [2021-03-10 23:17:22,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599297187] [2021-03-10 23:17:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:22,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:17:22,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 23:17:22,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:24,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:24,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-03-10 23:17:24,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548344615] [2021-03-10 23:17:24,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:17:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:17:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:17:24,149 INFO L87 Difference]: Start difference. First operand 9547 states and 32054 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:27,720 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:17:27,993 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:17:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:28,378 INFO L93 Difference]: Finished difference Result 19613 states and 64096 transitions. [2021-03-10 23:17:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:17:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:17:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:28,431 INFO L225 Difference]: With dead ends: 19613 [2021-03-10 23:17:28,431 INFO L226 Difference]: Without dead ends: 19515 [2021-03-10 23:17:28,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 3647.3ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:17:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2021-03-10 23:17:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 9361. [2021-03-10 23:17:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9361 states, 9360 states have (on average 3.351068376068376) internal successors, (31366), 9360 states have internal predecessors, (31366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 31366 transitions. [2021-03-10 23:17:28,689 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 31366 transitions. Word has length 34 [2021-03-10 23:17:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:28,689 INFO L480 AbstractCegarLoop]: Abstraction has 9361 states and 31366 transitions. [2021-03-10 23:17:28,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 31366 transitions. [2021-03-10 23:17:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:28,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:28,702 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:28,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-03-10 23:17:28,902 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 55 times [2021-03-10 23:17:28,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:28,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902615657] [2021-03-10 23:17:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902615657] [2021-03-10 23:17:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612441867] [2021-03-10 23:17:29,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:17:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:31,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:31,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-03-10 23:17:31,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179978980] [2021-03-10 23:17:31,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:17:31,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:17:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:17:31,175 INFO L87 Difference]: Start difference. First operand 9361 states and 31366 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:35,983 INFO L93 Difference]: Finished difference Result 15000 states and 49817 transitions. [2021-03-10 23:17:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:17:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 34 [2021-03-10 23:17:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:36,020 INFO L225 Difference]: With dead ends: 15000 [2021-03-10 23:17:36,020 INFO L226 Difference]: Without dead ends: 14920 [2021-03-10 23:17:36,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3706.2ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:17:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2021-03-10 23:17:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 9361. [2021-03-10 23:17:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9361 states, 9360 states have (on average 3.351068376068376) internal successors, (31366), 9360 states have internal predecessors, (31366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 31366 transitions. [2021-03-10 23:17:36,244 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 31366 transitions. Word has length 34 [2021-03-10 23:17:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:36,244 INFO L480 AbstractCegarLoop]: Abstraction has 9361 states and 31366 transitions. [2021-03-10 23:17:36,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-03-10 23:17:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 31366 transitions. [2021-03-10 23:17:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:17:36,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:36,258 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:36,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-03-10 23:17:36,459 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 56 times [2021-03-10 23:17:36,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:36,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980721508] [2021-03-10 23:17:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980721508] [2021-03-10 23:17:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148835541] [2021-03-10 23:17:36,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:37,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:17:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:17:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:37,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:37,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-03-10 23:17:37,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652655558] [2021-03-10 23:17:37,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:17:37,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:37,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:17:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:17:37,807 INFO L87 Difference]: Start difference. First operand 9361 states and 31366 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:17:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:43,623 INFO L93 Difference]: Finished difference Result 20174 states and 67139 transitions. [2021-03-10 23:17:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:17:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 34 [2021-03-10 23:17:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:43,676 INFO L225 Difference]: With dead ends: 20174 [2021-03-10 23:17:43,677 INFO L226 Difference]: Without dead ends: 20094 [2021-03-10 23:17:43,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 3329.4ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:17:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20094 states. [2021-03-10 23:17:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20094 to 9217. [2021-03-10 23:17:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9217 states, 9216 states have (on average 3.3522135416666665) internal successors, (30894), 9216 states have internal predecessors, (30894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9217 states to 9217 states and 30894 transitions. [2021-03-10 23:17:43,994 INFO L78 Accepts]: Start accepts. Automaton has 9217 states and 30894 transitions. Word has length 34 [2021-03-10 23:17:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:43,994 INFO L480 AbstractCegarLoop]: Abstraction has 9217 states and 30894 transitions. [2021-03-10 23:17:43,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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) [2021-03-10 23:17:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 9217 states and 30894 transitions. [2021-03-10 23:17:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:17:44,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:44,009 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:44,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:44,210 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1561626779, now seen corresponding path program 57 times [2021-03-10 23:17:44,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:44,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496503505] [2021-03-10 23:17:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:17:45,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496503505] [2021-03-10 23:17:45,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456591988] [2021-03-10 23:17:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:45,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:17:45,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:17:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:46,438 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:17:46,674 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:17:47,016 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:17:47,234 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:17:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:47,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:47,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-03-10 23:17:47,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791094629] [2021-03-10 23:17:47,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:17:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:17:47,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:17:47,426 INFO L87 Difference]: Start difference. First operand 9217 states and 30894 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:17:49,325 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:17:50,416 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:17:51,148 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:17:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:52,836 INFO L93 Difference]: Finished difference Result 10047 states and 33171 transitions. [2021-03-10 23:17:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:17:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 36 [2021-03-10 23:17:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:52,854 INFO L225 Difference]: With dead ends: 10047 [2021-03-10 23:17:52,854 INFO L226 Difference]: Without dead ends: 9933 [2021-03-10 23:17:52,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 4798.2ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:17:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9933 states. [2021-03-10 23:17:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9933 to 9299. [2021-03-10 23:17:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9299 states, 9298 states have (on average 3.3497526349752635) internal successors, (31146), 9298 states have internal predecessors, (31146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9299 states to 9299 states and 31146 transitions. [2021-03-10 23:17:53,033 INFO L78 Accepts]: Start accepts. Automaton has 9299 states and 31146 transitions. Word has length 36 [2021-03-10 23:17:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:53,033 INFO L480 AbstractCegarLoop]: Abstraction has 9299 states and 31146 transitions. [2021-03-10 23:17:53,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:17:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9299 states and 31146 transitions. [2021-03-10 23:17:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:17:53,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:53,049 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:53,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-03-10 23:17:53,250 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:53,250 INFO L82 PathProgramCache]: Analyzing trace with hash 834811493, now seen corresponding path program 58 times [2021-03-10 23:17:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:53,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368152988] [2021-03-10 23:17:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:17:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368152988] [2021-03-10 23:17:54,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444357121] [2021-03-10 23:17:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:54,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:17:54,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:17:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:55,466 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:17:55,740 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:17:55,995 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:17:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:56,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:56,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 23:17:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566420113] [2021-03-10 23:17:56,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:17:56,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:56,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:17:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:17:56,205 INFO L87 Difference]: Start difference. First operand 9299 states and 31146 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:17:58,459 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:17:58,698 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:17:59,144 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:17:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:59,468 INFO L93 Difference]: Finished difference Result 9822 states and 32527 transitions. [2021-03-10 23:17:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:17:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:17:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:59,493 INFO L225 Difference]: With dead ends: 9822 [2021-03-10 23:17:59,493 INFO L226 Difference]: Without dead ends: 9741 [2021-03-10 23:17:59,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4008.2ms TimeCoverageRelationStatistics Valid=410, Invalid=1942, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:17:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9741 states. [2021-03-10 23:17:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9741 to 9395. [2021-03-10 23:17:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.3410687672982755) internal successors, (31386), 9394 states have internal predecessors, (31386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 31386 transitions. [2021-03-10 23:17:59,663 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 31386 transitions. Word has length 36 [2021-03-10 23:17:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:59,663 INFO L480 AbstractCegarLoop]: Abstraction has 9395 states and 31386 transitions. [2021-03-10 23:17:59,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:17:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 31386 transitions. [2021-03-10 23:17:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:17:59,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:59,677 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:59,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:59,877 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -3115675, now seen corresponding path program 59 times [2021-03-10 23:17:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:59,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952936546] [2021-03-10 23:17:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:18:00,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952936546] [2021-03-10 23:18:00,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958424390] [2021-03-10 23:18:00,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:00,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:18:00,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:00,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:18:00,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:02,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:02,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 23:18:02,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383752719] [2021-03-10 23:18:02,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:18:02,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:18:02,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:18:02,547 INFO L87 Difference]: Start difference. First operand 9395 states and 31386 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:05,145 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:18:05,585 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:18:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:06,137 INFO L93 Difference]: Finished difference Result 10047 states and 33130 transitions. [2021-03-10 23:18:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:18:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:18:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:06,156 INFO L225 Difference]: With dead ends: 10047 [2021-03-10 23:18:06,156 INFO L226 Difference]: Without dead ends: 9851 [2021-03-10 23:18:06,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3977.8ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:18:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9851 states. [2021-03-10 23:18:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9851 to 9339. [2021-03-10 23:18:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9339 states, 9338 states have (on average 3.345255943456843) internal successors, (31238), 9338 states have internal predecessors, (31238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 31238 transitions. [2021-03-10 23:18:06,391 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 31238 transitions. Word has length 36 [2021-03-10 23:18:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:06,392 INFO L480 AbstractCegarLoop]: Abstraction has 9339 states and 31238 transitions. [2021-03-10 23:18:06,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 31238 transitions. [2021-03-10 23:18:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:18:06,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:06,404 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:06,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-03-10 23:18:06,605 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1885816223, now seen corresponding path program 60 times [2021-03-10 23:18:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:06,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052170514] [2021-03-10 23:18:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052170514] [2021-03-10 23:18:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958928760] [2021-03-10 23:18:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:07,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:18:07,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:18:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:08,966 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:18:09,306 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:18:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:09,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:09,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-03-10 23:18:09,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339296729] [2021-03-10 23:18:09,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:18:09,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:09,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:18:09,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:18:09,505 INFO L87 Difference]: Start difference. First operand 9339 states and 31238 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2021-03-10 23:18:13,217 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:18:13,915 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:18:14,428 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:18:14,859 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:18:15,300 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:18:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:15,981 INFO L93 Difference]: Finished difference Result 10147 states and 33435 transitions. [2021-03-10 23:18:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:18:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 36 [2021-03-10 23:18:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:16,007 INFO L225 Difference]: With dead ends: 10147 [2021-03-10 23:18:16,007 INFO L226 Difference]: Without dead ends: 10033 [2021-03-10 23:18:16,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 4744.8ms TimeCoverageRelationStatistics Valid=419, Invalid=2337, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:18:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2021-03-10 23:18:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 9435. [2021-03-10 23:18:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9435 states, 9434 states have (on average 3.3391986432054273) internal successors, (31502), 9434 states have internal predecessors, (31502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9435 states to 9435 states and 31502 transitions. [2021-03-10 23:18:16,248 INFO L78 Accepts]: Start accepts. Automaton has 9435 states and 31502 transitions. Word has length 36 [2021-03-10 23:18:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:16,248 INFO L480 AbstractCegarLoop]: Abstraction has 9435 states and 31502 transitions. [2021-03-10 23:18:16,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2021-03-10 23:18:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9435 states and 31502 transitions. [2021-03-10 23:18:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:18:16,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:16,264 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:16,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:16,464 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1571223905, now seen corresponding path program 61 times [2021-03-10 23:18:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961399699] [2021-03-10 23:18:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961399699] [2021-03-10 23:18:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193636328] [2021-03-10 23:18:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:17,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:18:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:19,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:19,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 23:18:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400648932] [2021-03-10 23:18:19,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:18:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:18:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:18:19,176 INFO L87 Difference]: Start difference. First operand 9435 states and 31502 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:22,605 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:18:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:23,499 INFO L93 Difference]: Finished difference Result 10333 states and 33950 transitions. [2021-03-10 23:18:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:18:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:18:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:23,518 INFO L225 Difference]: With dead ends: 10333 [2021-03-10 23:18:23,518 INFO L226 Difference]: Without dead ends: 10153 [2021-03-10 23:18:23,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 4145.5ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:18:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10153 states. [2021-03-10 23:18:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10153 to 9379. [2021-03-10 23:18:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.3442098528470887) internal successors, (31362), 9378 states have internal predecessors, (31362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 31362 transitions. [2021-03-10 23:18:23,662 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 31362 transitions. Word has length 36 [2021-03-10 23:18:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:23,662 INFO L480 AbstractCegarLoop]: Abstraction has 9379 states and 31362 transitions. [2021-03-10 23:18:23,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 31362 transitions. [2021-03-10 23:18:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:18:23,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:23,677 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:23,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-03-10 23:18:23,878 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1212016539, now seen corresponding path program 62 times [2021-03-10 23:18:23,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:23,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568150073] [2021-03-10 23:18:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:24,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568150073] [2021-03-10 23:18:24,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556069199] [2021-03-10 23:18:24,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:24,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:18:24,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:18:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:26,195 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:18:26,542 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:18:26,819 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:18:27,252 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:18:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:27,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:27,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-03-10 23:18:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119665553] [2021-03-10 23:18:27,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:18:27,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:18:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:18:27,474 INFO L87 Difference]: Start difference. First operand 9379 states and 31362 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:28,033 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:18:28,984 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:18:29,165 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:18:29,641 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:18:30,329 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:18:30,704 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-03-10 23:18:30,866 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:18:31,612 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:18:31,805 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-03-10 23:18:32,475 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-03-10 23:18:32,693 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-03-10 23:18:33,331 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-03-10 23:18:33,576 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-03-10 23:18:33,931 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:18:35,097 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-03-10 23:18:35,406 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:18:35,691 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-03-10 23:18:35,911 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:18:36,456 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:18:36,753 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-10 23:18:37,549 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:18:37,886 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:18:38,247 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:18:38,743 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:18:39,176 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 23:18:39,633 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:18:39,904 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 23:18:40,200 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 23:18:40,652 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 23:18:40,836 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 23:18:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:41,379 INFO L93 Difference]: Finished difference Result 15559 states and 49694 transitions. [2021-03-10 23:18:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 23:18:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:18:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:41,407 INFO L225 Difference]: With dead ends: 15559 [2021-03-10 23:18:41,407 INFO L226 Difference]: Without dead ends: 15418 [2021-03-10 23:18:41,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 11879.2ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 23:18:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15418 states. [2021-03-10 23:18:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15418 to 9473. [2021-03-10 23:18:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9473 states, 9472 states have (on average 3.343116554054054) internal successors, (31666), 9472 states have internal predecessors, (31666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9473 states to 9473 states and 31666 transitions. [2021-03-10 23:18:41,629 INFO L78 Accepts]: Start accepts. Automaton has 9473 states and 31666 transitions. Word has length 36 [2021-03-10 23:18:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 9473 states and 31666 transitions. [2021-03-10 23:18:41,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9473 states and 31666 transitions. [2021-03-10 23:18:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:18:41,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:41,646 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:41,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:41,846 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash -754809243, now seen corresponding path program 63 times [2021-03-10 23:18:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:41,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028623967] [2021-03-10 23:18:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:42,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028623967] [2021-03-10 23:18:42,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700651172] [2021-03-10 23:18:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:42,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:18:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:18:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:44,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:44,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-03-10 23:18:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270741835] [2021-03-10 23:18:44,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:18:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:44,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:18:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:18:44,776 INFO L87 Difference]: Start difference. First operand 9473 states and 31666 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:18:45,904 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:18:46,118 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:18:46,349 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:18:47,388 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:18:49,093 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:18:50,452 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:18:50,690 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:18:52,201 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:18:52,534 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:18:52,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:18:53,172 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:18:53,543 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:18:54,363 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:18:54,591 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:18:55,188 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:18:55,394 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:18:55,609 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:18:55,884 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:18:56,264 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:18:56,519 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:18:56,880 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:18:57,817 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:18:58,528 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:18:58,912 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:18:59,232 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:18:59,776 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:19:00,250 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:19:00,849 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:19:01,189 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:19:01,712 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-10 23:19:02,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:02,948 INFO L93 Difference]: Finished difference Result 14470 states and 46353 transitions. [2021-03-10 23:19:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 23:19:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:19:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:02,988 INFO L225 Difference]: With dead ends: 14470 [2021-03-10 23:19:02,989 INFO L226 Difference]: Without dead ends: 14189 [2021-03-10 23:19:02,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 11594.4ms TimeCoverageRelationStatistics Valid=1018, Invalid=8294, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 23:19:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14189 states. [2021-03-10 23:19:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14189 to 9459. [2021-03-10 23:19:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9458 states have (on average 3.3455275956861916) internal successors, (31642), 9458 states have internal predecessors, (31642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 31642 transitions. [2021-03-10 23:19:03,229 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 31642 transitions. Word has length 36 [2021-03-10 23:19:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:03,229 INFO L480 AbstractCegarLoop]: Abstraction has 9459 states and 31642 transitions. [2021-03-10 23:19:03,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:19:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 31642 transitions. [2021-03-10 23:19:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:19:03,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:03,245 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:03,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:03,446 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash 359968101, now seen corresponding path program 64 times [2021-03-10 23:19:03,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:03,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401997258] [2021-03-10 23:19:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401997258] [2021-03-10 23:19:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574836622] [2021-03-10 23:19:04,536 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 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 [2021-03-10 23:19:04,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:19:04,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:19:04,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:07,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:07,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 23:19:07,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918934234] [2021-03-10 23:19:07,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:19:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:19:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:07,020 INFO L87 Difference]: Start difference. First operand 9459 states and 31642 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:19:07,604 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:19:08,351 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:08,560 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:19:08,779 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:19:09,166 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:19:09,593 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-10 23:19:09,818 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:19:10,085 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:19:10,390 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:19:10,926 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:19:11,176 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:19:11,385 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:19:12,494 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:19:13,446 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:19:13,710 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:19:13,961 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:19:14,371 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:19:15,668 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:15,852 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:19:18,366 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:19:18,601 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 23:19:19,214 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 23:19:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:19,580 INFO L93 Difference]: Finished difference Result 16427 states and 52271 transitions. [2021-03-10 23:19:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 23:19:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 36 [2021-03-10 23:19:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:19,624 INFO L225 Difference]: With dead ends: 16427 [2021-03-10 23:19:19,624 INFO L226 Difference]: Without dead ends: 16155 [2021-03-10 23:19:19,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 10654.4ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 23:19:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16155 states. [2021-03-10 23:19:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16155 to 9473. [2021-03-10 23:19:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9473 states, 9472 states have (on average 3.34375) internal successors, (31672), 9472 states have internal predecessors, (31672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9473 states to 9473 states and 31672 transitions. [2021-03-10 23:19:19,890 INFO L78 Accepts]: Start accepts. Automaton has 9473 states and 31672 transitions. Word has length 36 [2021-03-10 23:19:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:19,890 INFO L480 AbstractCegarLoop]: Abstraction has 9473 states and 31672 transitions. [2021-03-10 23:19:19,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:19:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 9473 states and 31672 transitions. [2021-03-10 23:19:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:19:19,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:19,907 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:20,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:20,108 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:20,108 INFO L82 PathProgramCache]: Analyzing trace with hash 663543393, now seen corresponding path program 65 times [2021-03-10 23:19:20,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:20,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543157559] [2021-03-10 23:19:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543157559] [2021-03-10 23:19:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273751152] [2021-03-10 23:19:20,978 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 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 [2021-03-10 23:19:21,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:19:21,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:19:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:23,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:23,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 23:19:23,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194289517] [2021-03-10 23:19:23,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:19:23,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:19:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:23,766 INFO L87 Difference]: Start difference. First operand 9473 states and 31672 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:19:24,561 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:19:25,410 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:25,622 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:19:25,839 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:19:26,260 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:19:26,706 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-10 23:19:26,945 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:19:27,222 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:19:27,688 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:19:28,025 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:19:28,319 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:19:28,531 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:19:28,877 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:19:29,746 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:19:30,772 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:19:31,063 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:19:31,338 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:19:31,824 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:19:32,031 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:19:33,078 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 23:19:33,958 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:34,165 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:19:35,025 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:35,337 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:19:35,646 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-10 23:19:36,300 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 23:19:37,015 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:19:37,457 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:19:37,946 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:19:39,442 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:19:40,240 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:19:40,740 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:19:41,013 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 23:19:41,718 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 23:19:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:42,181 INFO L93 Difference]: Finished difference Result 17170 states and 54487 transitions. [2021-03-10 23:19:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-03-10 23:19:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 36 [2021-03-10 23:19:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:42,222 INFO L225 Difference]: With dead ends: 17170 [2021-03-10 23:19:42,223 INFO L226 Difference]: Without dead ends: 16922 [2021-03-10 23:19:42,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 13368.0ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-03-10 23:19:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16922 states. [2021-03-10 23:19:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16922 to 9508. [2021-03-10 23:19:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 9507 states have (on average 3.342905227726938) internal successors, (31781), 9507 states have internal predecessors, (31781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 31781 transitions. [2021-03-10 23:19:42,483 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 31781 transitions. Word has length 36 [2021-03-10 23:19:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:42,483 INFO L480 AbstractCegarLoop]: Abstraction has 9508 states and 31781 transitions. [2021-03-10 23:19:42,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:19:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 31781 transitions. [2021-03-10 23:19:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:19:42,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:42,500 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:42,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-03-10 23:19:42,701 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 66 times [2021-03-10 23:19:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:42,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653408819] [2021-03-10 23:19:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:43,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653408819] [2021-03-10 23:19:43,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93688790] [2021-03-10 23:19:43,854 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 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 [2021-03-10 23:19:43,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:19:43,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:19:43,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:45,148 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:19:46,134 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:19:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:46,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:46,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-03-10 23:19:46,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215863399] [2021-03-10 23:19:46,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:19:46,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:19:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:19:46,342 INFO L87 Difference]: Start difference. First operand 9508 states and 31781 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:19:46,986 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:19:47,818 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:48,009 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:19:48,230 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:19:48,518 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:19:48,850 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:19:49,106 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-10 23:19:49,359 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:19:49,583 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:19:49,936 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:19:50,288 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:19:50,582 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:19:50,808 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:19:51,249 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:19:52,010 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:19:52,230 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:19:52,488 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:19:52,799 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:19:53,106 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:19:53,385 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:19:54,015 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:19:54,275 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:19:54,588 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:19:54,984 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:19:55,287 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:19:56,573 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:56,805 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:19:57,028 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:19:57,280 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 23:19:58,132 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:19:58,560 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:19:59,091 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:20:00,039 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:20:00,322 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:20:00,728 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:20:00,964 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:20:01,452 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:20:01,765 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:20:02,197 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:20:02,578 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:20:03,177 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:20:03,592 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:20:04,088 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:20:04,685 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 23:20:05,483 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:20:05,940 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:20:06,828 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:20:07,371 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 23:20:07,628 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 23:20:08,382 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:20:08,801 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:20:09,342 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:20:09,907 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 23:20:10,652 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:20:11,217 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:20:11,876 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:20:12,520 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-10 23:20:14,399 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2021-03-10 23:20:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:15,169 INFO L93 Difference]: Finished difference Result 18492 states and 58334 transitions. [2021-03-10 23:20:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-03-10 23:20:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:20:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:15,210 INFO L225 Difference]: With dead ends: 18492 [2021-03-10 23:20:15,210 INFO L226 Difference]: Without dead ends: 18309 [2021-03-10 23:20:15,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 20316.5ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-03-10 23:20:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18309 states. [2021-03-10 23:20:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18309 to 9502. [2021-03-10 23:20:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.3436480370487316) internal successors, (31768), 9501 states have internal predecessors, (31768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 31768 transitions. [2021-03-10 23:20:15,457 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 31768 transitions. Word has length 36 [2021-03-10 23:20:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:15,457 INFO L480 AbstractCegarLoop]: Abstraction has 9502 states and 31768 transitions. [2021-03-10 23:20:15,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:20:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 31768 transitions. [2021-03-10 23:20:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:20:15,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:15,469 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:15,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable571 [2021-03-10 23:20:15,670 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash 153628769, now seen corresponding path program 67 times [2021-03-10 23:20:15,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:15,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681995860] [2021-03-10 23:20:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:17,172 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:20:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681995860] [2021-03-10 23:20:17,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938237287] [2021-03-10 23:20:17,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:20:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:17,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:20:17,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:18,547 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:20:19,456 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:20:19,891 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:20:20,291 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:20:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:20,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:20,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-03-10 23:20:20,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875698874] [2021-03-10 23:20:20,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:20:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:20:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:20:20,616 INFO L87 Difference]: Start difference. First operand 9502 states and 31768 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:20:21,135 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:20:21,408 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:20:22,053 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:20:22,407 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:20:22,748 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:20:23,258 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:20:23,869 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:20:24,290 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:20:24,978 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:20:25,354 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:20:26,206 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:20:26,371 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:20:27,771 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:20:28,167 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:20:28,981 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:20:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:29,464 INFO L93 Difference]: Finished difference Result 14261 states and 45795 transitions. [2021-03-10 23:20:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:20:29,468 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:20:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:29,506 INFO L225 Difference]: With dead ends: 14261 [2021-03-10 23:20:29,506 INFO L226 Difference]: Without dead ends: 14180 [2021-03-10 23:20:29,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 8645.9ms TimeCoverageRelationStatistics Valid=630, Invalid=3152, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:20:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-03-10 23:20:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9552. [2021-03-10 23:20:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9552 states, 9551 states have (on average 3.342058423201759) internal successors, (31920), 9551 states have internal predecessors, (31920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9552 states to 9552 states and 31920 transitions. [2021-03-10 23:20:29,765 INFO L78 Accepts]: Start accepts. Automaton has 9552 states and 31920 transitions. Word has length 36 [2021-03-10 23:20:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:29,765 INFO L480 AbstractCegarLoop]: Abstraction has 9552 states and 31920 transitions. [2021-03-10 23:20:29,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:20:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9552 states and 31920 transitions. [2021-03-10 23:20:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:20:29,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:29,849 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:30,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-03-10 23:20:30,053 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash -684298399, now seen corresponding path program 68 times [2021-03-10 23:20:30,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:30,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570070382] [2021-03-10 23:20:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570070382] [2021-03-10 23:20:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968543620] [2021-03-10 23:20:31,308 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 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 [2021-03-10 23:20:31,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:20:31,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:20:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:32,725 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:20:33,388 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:20:33,994 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:20:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:34,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:34,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-03-10 23:20:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067297495] [2021-03-10 23:20:34,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:20:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:20:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:20:34,233 INFO L87 Difference]: Start difference. First operand 9552 states and 31920 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:20:34,759 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:20:35,688 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:20:36,557 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:20:36,901 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:20:37,428 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:20:38,958 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 23:20:39,151 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:20:40,174 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 23:20:40,465 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:20:41,012 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 23:20:41,347 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:20:41,933 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:20:42,273 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:20:42,482 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:20:42,966 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:20:43,151 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:20:43,329 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:20:43,580 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:20:43,784 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:20:44,119 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:20:44,330 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:20:44,663 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:20:45,245 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:20:45,557 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:20:46,464 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:20:46,770 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:20:47,337 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:20:47,579 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:20:47,828 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:20:48,495 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 23:20:48,775 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 23:20:49,159 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:20:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:50,713 INFO L93 Difference]: Finished difference Result 14948 states and 47792 transitions. [2021-03-10 23:20:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-03-10 23:20:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:20:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:50,748 INFO L225 Difference]: With dead ends: 14948 [2021-03-10 23:20:50,748 INFO L226 Difference]: Without dead ends: 14707 [2021-03-10 23:20:50,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 12729.2ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 23:20:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-03-10 23:20:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 9510. [2021-03-10 23:20:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3467241560626775) internal successors, (31824), 9509 states have internal predecessors, (31824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31824 transitions. [2021-03-10 23:20:50,954 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31824 transitions. Word has length 36 [2021-03-10 23:20:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:50,954 INFO L480 AbstractCegarLoop]: Abstraction has 9510 states and 31824 transitions. [2021-03-10 23:20:50,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:20:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31824 transitions. [2021-03-10 23:20:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:20:50,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:50,968 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:51,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:20:51,169 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -24338335, now seen corresponding path program 69 times [2021-03-10 23:20:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:51,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242530863] [2021-03-10 23:20:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:52,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242530863] [2021-03-10 23:20:52,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604220260] [2021-03-10 23:20:52,168 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 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 [2021-03-10 23:20:52,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:20:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:20:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:53,749 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:20:54,042 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:20:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:54,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:54,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-03-10 23:20:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926254994] [2021-03-10 23:20:54,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:20:54,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:20:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:20:54,241 INFO L87 Difference]: Start difference. First operand 9510 states and 31824 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:20:54,676 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:20:55,572 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:20:56,547 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:20:57,434 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:20:57,677 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:20:59,470 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:21:00,322 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:21:00,720 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:21:01,021 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:21:01,775 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:21:02,100 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:21:02,494 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:21:02,918 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:21:03,545 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:21:03,854 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:21:04,123 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:21:04,393 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:21:04,697 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:21:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:05,901 INFO L93 Difference]: Finished difference Result 15528 states and 49620 transitions. [2021-03-10 23:21:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 23:21:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 36 [2021-03-10 23:21:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:05,936 INFO L225 Difference]: With dead ends: 15528 [2021-03-10 23:21:05,936 INFO L226 Difference]: Without dead ends: 15414 [2021-03-10 23:21:05,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 8632.1ms TimeCoverageRelationStatistics Valid=863, Invalid=5143, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 23:21:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15414 states. [2021-03-10 23:21:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15414 to 9524. [2021-03-10 23:21:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3478945710385384) internal successors, (31882), 9523 states have internal predecessors, (31882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31882 transitions. [2021-03-10 23:21:06,138 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31882 transitions. Word has length 36 [2021-03-10 23:21:06,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:06,138 INFO L480 AbstractCegarLoop]: Abstraction has 9524 states and 31882 transitions. [2021-03-10 23:21:06,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:21:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31882 transitions. [2021-03-10 23:21:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:21:06,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:06,151 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:06,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-03-10 23:21:06,352 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1744269983, now seen corresponding path program 70 times [2021-03-10 23:21:06,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:06,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152239276] [2021-03-10 23:21:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:21:07,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152239276] [2021-03-10 23:21:07,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619159786] [2021-03-10 23:21:07,179 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 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 [2021-03-10 23:21:07,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:21:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:21:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:09,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:09,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-03-10 23:21:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810329616] [2021-03-10 23:21:09,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:21:09,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:21:09,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:21:09,164 INFO L87 Difference]: Start difference. First operand 9524 states and 31882 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:21:09,585 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:21:09,764 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:21:10,811 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:21:10,981 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:21:11,265 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:21:12,207 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:21:12,908 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:21:13,155 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 23:21:13,461 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:21:13,684 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:21:14,094 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:21:14,272 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:21:14,463 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:21:14,883 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:21:15,195 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:21:15,499 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:21:16,107 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:21:16,523 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:21:16,749 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:21:17,406 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:21:17,602 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:21:17,793 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:21:18,516 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:21:18,862 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:21:19,349 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:21:20,214 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:21:20,573 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:21:20,833 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:21:21,227 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:21:21,832 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:21:22,355 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:21:22,928 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 23:21:23,559 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:21:24,233 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:21:24,552 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:21:24,820 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:21:25,010 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:21:25,725 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-10 23:21:26,316 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 23:21:26,868 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:21:27,278 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:21:27,774 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-10 23:21:29,343 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:21:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:29,533 INFO L93 Difference]: Finished difference Result 18732 states and 59179 transitions. [2021-03-10 23:21:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-03-10 23:21:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:21:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:29,575 INFO L225 Difference]: With dead ends: 18732 [2021-03-10 23:21:29,575 INFO L226 Difference]: Without dead ends: 18560 [2021-03-10 23:21:29,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 13282.1ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-03-10 23:21:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-03-10 23:21:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 9524. [2021-03-10 23:21:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3478945710385384) internal successors, (31882), 9523 states have internal predecessors, (31882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31882 transitions. [2021-03-10 23:21:29,831 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31882 transitions. Word has length 36 [2021-03-10 23:21:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:29,831 INFO L480 AbstractCegarLoop]: Abstraction has 9524 states and 31882 transitions. [2021-03-10 23:21:29,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:21:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31882 transitions. [2021-03-10 23:21:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:21:29,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:29,845 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:30,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-03-10 23:21:30,059 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1544243469, now seen corresponding path program 71 times [2021-03-10 23:21:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:30,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350957053] [2021-03-10 23:21:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:31,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350957053] [2021-03-10 23:21:31,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166629249] [2021-03-10 23:21:31,080 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 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 [2021-03-10 23:21:31,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:21:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:21:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:32,862 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:21:33,115 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:21:33,641 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:21:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:33,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:33,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 23:21:33,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615904482] [2021-03-10 23:21:33,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:21:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:21:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:21:33,873 INFO L87 Difference]: Start difference. First operand 9524 states and 31882 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:21:35,920 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:21:36,403 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:21:36,583 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:21:36,989 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:21:37,435 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 23:21:38,469 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:21:38,773 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:21:39,245 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:21:39,586 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:21:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:39,926 INFO L93 Difference]: Finished difference Result 12968 states and 42471 transitions. [2021-03-10 23:21:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:21:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 36 [2021-03-10 23:21:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:39,958 INFO L225 Difference]: With dead ends: 12968 [2021-03-10 23:21:39,958 INFO L226 Difference]: Without dead ends: 12914 [2021-03-10 23:21:39,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 6451.4ms TimeCoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:21:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12914 states. [2021-03-10 23:21:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12914 to 9588. [2021-03-10 23:21:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9588 states, 9587 states have (on average 3.3443204339209345) internal successors, (32062), 9587 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9588 states to 9588 states and 32062 transitions. [2021-03-10 23:21:40,165 INFO L78 Accepts]: Start accepts. Automaton has 9588 states and 32062 transitions. Word has length 36 [2021-03-10 23:21:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:40,165 INFO L480 AbstractCegarLoop]: Abstraction has 9588 states and 32062 transitions. [2021-03-10 23:21:40,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:21:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9588 states and 32062 transitions. [2021-03-10 23:21:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:21:40,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:40,180 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:40,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-03-10 23:21:40,381 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 706316301, now seen corresponding path program 72 times [2021-03-10 23:21:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:40,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126328188] [2021-03-10 23:21:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126328188] [2021-03-10 23:21:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582121773] [2021-03-10 23:21:41,522 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 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 [2021-03-10 23:21:41,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:21:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:21:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:43,067 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:21:43,550 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:21:43,888 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:21:44,332 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:21:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:44,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:44,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-03-10 23:21:44,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280262770] [2021-03-10 23:21:44,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:21:44,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:44,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:21:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:21:44,615 INFO L87 Difference]: Start difference. First operand 9588 states and 32062 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:21:46,742 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:21:47,904 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:21:49,128 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:21:50,177 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:21:50,767 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:21:51,127 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:21:51,670 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:21:52,285 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:21:53,057 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:21:53,542 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:21:53,904 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:21:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:54,701 INFO L93 Difference]: Finished difference Result 10838 states and 35639 transitions. [2021-03-10 23:21:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:21:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:21:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:54,729 INFO L225 Difference]: With dead ends: 10838 [2021-03-10 23:21:54,729 INFO L226 Difference]: Without dead ends: 10724 [2021-03-10 23:21:54,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 7725.8ms TimeCoverageRelationStatistics Valid=454, Invalid=2968, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:21:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-03-10 23:21:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 9596. [2021-03-10 23:21:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9596 states, 9595 states have (on average 3.346117769671704) internal successors, (32106), 9595 states have internal predecessors, (32106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9596 states to 9596 states and 32106 transitions. [2021-03-10 23:21:54,919 INFO L78 Accepts]: Start accepts. Automaton has 9596 states and 32106 transitions. Word has length 36 [2021-03-10 23:21:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:54,919 INFO L480 AbstractCegarLoop]: Abstraction has 9596 states and 32106 transitions. [2021-03-10 23:21:54,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:21:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9596 states and 32106 transitions. [2021-03-10 23:21:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:21:54,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:54,934 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:55,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:21:55,134 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash -354285555, now seen corresponding path program 73 times [2021-03-10 23:21:55,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:55,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678438855] [2021-03-10 23:21:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:56,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678438855] [2021-03-10 23:21:56,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894012432] [2021-03-10 23:21:56,423 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 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 [2021-03-10 23:21:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:21:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:58,348 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:21:58,739 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:21:59,101 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:21:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:21:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-03-10 23:21:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16095857] [2021-03-10 23:21:59,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:21:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:21:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:21:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:21:59,393 INFO L87 Difference]: Start difference. First operand 9596 states and 32106 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:22:03,613 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:22:03,987 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:22:04,671 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:22:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:05,249 INFO L93 Difference]: Finished difference Result 10155 states and 33547 transitions. [2021-03-10 23:22:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:22:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:22:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:05,274 INFO L225 Difference]: With dead ends: 10155 [2021-03-10 23:22:05,274 INFO L226 Difference]: Without dead ends: 10074 [2021-03-10 23:22:05,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 5674.1ms TimeCoverageRelationStatistics Valid=362, Invalid=2088, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:22:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2021-03-10 23:22:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 9628. [2021-03-10 23:22:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9628 states, 9627 states have (on average 3.3433052872130467) internal successors, (32186), 9627 states have internal predecessors, (32186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9628 states to 9628 states and 32186 transitions. [2021-03-10 23:22:05,454 INFO L78 Accepts]: Start accepts. Automaton has 9628 states and 32186 transitions. Word has length 36 [2021-03-10 23:22:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:05,455 INFO L480 AbstractCegarLoop]: Abstraction has 9628 states and 32186 transitions. [2021-03-10 23:22:05,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:22:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9628 states and 32186 transitions. [2021-03-10 23:22:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:22:05,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:05,470 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:05,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:05,671 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1192212723, now seen corresponding path program 74 times [2021-03-10 23:22:05,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:05,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699265235] [2021-03-10 23:22:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:06,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699265235] [2021-03-10 23:22:06,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639059709] [2021-03-10 23:22:06,810 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 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 [2021-03-10 23:22:06,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:22:06,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:22:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:22:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:08,386 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:22:08,875 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:22:09,476 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:22:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:09,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:09,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-03-10 23:22:09,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172456047] [2021-03-10 23:22:09,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:22:09,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:22:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:22:09,719 INFO L87 Difference]: Start difference. First operand 9628 states and 32186 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:22:13,046 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:22:14,676 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:22:16,085 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:22:16,782 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-10 23:22:17,474 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:22:17,743 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:22:18,023 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:22:19,026 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:22:19,569 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:22:20,212 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 23:22:20,883 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:22:21,353 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:22:21,766 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 23:22:22,308 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:22:23,032 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-10 23:22:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:23,692 INFO L93 Difference]: Finished difference Result 10765 states and 35333 transitions. [2021-03-10 23:22:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 23:22:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:22:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:23,723 INFO L225 Difference]: With dead ends: 10765 [2021-03-10 23:22:23,723 INFO L226 Difference]: Without dead ends: 10508 [2021-03-10 23:22:23,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 9066.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:22:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10508 states. [2021-03-10 23:22:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10508 to 9588. [2021-03-10 23:22:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9588 states, 9587 states have (on average 3.3476582872640033) internal successors, (32094), 9587 states have internal predecessors, (32094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9588 states to 9588 states and 32094 transitions. [2021-03-10 23:22:23,925 INFO L78 Accepts]: Start accepts. Automaton has 9588 states and 32094 transitions. Word has length 36 [2021-03-10 23:22:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:23,925 INFO L480 AbstractCegarLoop]: Abstraction has 9588 states and 32094 transitions. [2021-03-10 23:22:23,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:22:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9588 states and 32094 transitions. [2021-03-10 23:22:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:22:23,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:23,942 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:24,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:24,143 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1850978317, now seen corresponding path program 75 times [2021-03-10 23:22:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:24,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637930285] [2021-03-10 23:22:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:25,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637930285] [2021-03-10 23:22:25,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708950919] [2021-03-10 23:22:25,505 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 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 [2021-03-10 23:22:25,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:22:25,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:22:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:22:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:27,421 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:22:27,830 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:22:28,517 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:22:28,986 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:22:29,284 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:22:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:29,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:29,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-03-10 23:22:29,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839991636] [2021-03-10 23:22:29,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:22:29,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:29,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:22:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:22:29,380 INFO L87 Difference]: Start difference. First operand 9588 states and 32094 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:22:30,318 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:22:30,800 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:22:31,161 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:22:31,709 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-10 23:22:32,150 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2021-03-10 23:22:32,475 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-10 23:22:33,064 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:22:33,480 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:22:33,959 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:22:34,642 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:22:34,914 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:22:35,365 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:22:35,668 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:22:35,875 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:22:36,277 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2021-03-10 23:22:36,534 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-03-10 23:22:36,894 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 23:22:37,137 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:22:37,474 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:22:37,678 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:22:38,014 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:22:38,563 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:22:38,851 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:22:39,519 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:22:39,812 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:22:40,021 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-03-10 23:22:40,507 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 23:22:40,977 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:22:41,653 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:22:41,906 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:22:42,330 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-03-10 23:22:42,875 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 23:22:43,085 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-10 23:22:43,361 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:22:43,751 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:22:44,483 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:22:45,420 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-03-10 23:22:46,104 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 23:22:46,552 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:22:47,561 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:22:48,043 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 23:22:48,503 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 23:22:49,861 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 23:22:50,428 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 23:22:50,931 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:22:51,601 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:22:52,092 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-10 23:22:52,707 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:22:53,935 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:22:54,572 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:22:55,447 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 23:22:55,920 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:22:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:57,926 INFO L93 Difference]: Finished difference Result 18908 states and 60668 transitions. [2021-03-10 23:22:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-03-10 23:22:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 36 [2021-03-10 23:22:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:57,978 INFO L225 Difference]: With dead ends: 18908 [2021-03-10 23:22:57,978 INFO L226 Difference]: Without dead ends: 18788 [2021-03-10 23:22:57,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 21289.1ms TimeCoverageRelationStatistics Valid=1454, Invalid=9052, Unknown=0, NotChecked=0, Total=10506 [2021-03-10 23:22:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18788 states. [2021-03-10 23:22:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18788 to 9622. [2021-03-10 23:22:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9622 states, 9621 states have (on average 3.3480927138551086) internal successors, (32212), 9621 states have internal predecessors, (32212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9622 states to 9622 states and 32212 transitions. [2021-03-10 23:22:58,262 INFO L78 Accepts]: Start accepts. Automaton has 9622 states and 32212 transitions. Word has length 36 [2021-03-10 23:22:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:58,262 INFO L480 AbstractCegarLoop]: Abstraction has 9622 states and 32212 transitions. [2021-03-10 23:22:58,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:22:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9622 states and 32212 transitions. [2021-03-10 23:22:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:22:58,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:58,278 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:58,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-03-10 23:22:58,478 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1569280243, now seen corresponding path program 76 times [2021-03-10 23:22:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:58,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35630844] [2021-03-10 23:22:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:00,308 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:23:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:00,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35630844] [2021-03-10 23:23:00,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308276875] [2021-03-10 23:23:00,406 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 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 [2021-03-10 23:23:00,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:23:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:23:00,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:02,236 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:23:02,636 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:23:02,892 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:23:03,248 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:23:03,705 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:23:04,222 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:23:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:04,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:04,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 23:23:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429470792] [2021-03-10 23:23:04,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:23:04,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:23:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:04,562 INFO L87 Difference]: Start difference. First operand 9622 states and 32212 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:23:05,221 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:23:06,219 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-03-10 23:23:06,494 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:23:06,862 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:23:07,316 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-03-10 23:23:07,765 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:23:07,965 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:23:08,288 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:23:08,612 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:23:08,815 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:23:09,203 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:23:10,267 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:23:10,618 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:23:11,460 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 23:23:12,036 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:23:12,402 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:23:12,909 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 23:23:14,669 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:23:15,698 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:23:16,245 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:23:17,066 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:23:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:17,514 INFO L93 Difference]: Finished difference Result 15276 states and 48955 transitions. [2021-03-10 23:23:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 23:23:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 36 [2021-03-10 23:23:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:17,557 INFO L225 Difference]: With dead ends: 15276 [2021-03-10 23:23:17,557 INFO L226 Difference]: Without dead ends: 15188 [2021-03-10 23:23:17,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 12265.0ms TimeCoverageRelationStatistics Valid=709, Invalid=4547, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:23:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2021-03-10 23:23:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 9624. [2021-03-10 23:23:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9624 states, 9623 states have (on average 3.34698119089681) internal successors, (32208), 9623 states have internal predecessors, (32208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 32208 transitions. [2021-03-10 23:23:17,811 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 32208 transitions. Word has length 36 [2021-03-10 23:23:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:17,812 INFO L480 AbstractCegarLoop]: Abstraction has 9624 states and 32208 transitions. [2021-03-10 23:23:17,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:23:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 32208 transitions. [2021-03-10 23:23:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:23:17,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:17,828 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:18,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:18,029 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash 698441229, now seen corresponding path program 77 times [2021-03-10 23:23:18,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:18,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988829371] [2021-03-10 23:23:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:19,507 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 23:23:19,919 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:23:20,135 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:23:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:20,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988829371] [2021-03-10 23:23:20,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378286495] [2021-03-10 23:23:20,234 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 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 [2021-03-10 23:23:20,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:23:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:23:20,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:22,549 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:23:23,014 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:23:23,619 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:23:23,889 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:23:24,209 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:23:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:24,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:24,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-03-10 23:23:24,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399407507] [2021-03-10 23:23:24,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:23:24,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:23:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:23:24,319 INFO L87 Difference]: Start difference. First operand 9624 states and 32208 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:23:25,241 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:23:25,739 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:23:26,540 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 23:23:26,833 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:23:27,281 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:23:27,533 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 23:23:27,893 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:23:28,144 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-03-10 23:23:28,478 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:23:28,755 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:23:29,162 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:23:29,448 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:23:29,835 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:23:30,208 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 23:23:30,868 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:23:31,106 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:23:31,314 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:23:31,692 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:23:32,100 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:23:32,577 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:23:33,723 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-10 23:23:33,977 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:23:34,179 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:23:34,494 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-03-10 23:23:34,916 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:23:35,457 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 23:23:36,002 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 23:23:36,219 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:23:37,515 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:23:37,973 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:23:38,770 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:23:39,501 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 23:23:40,956 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:23:41,612 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:23:42,252 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:23:43,153 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 23:23:44,291 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:23:44,931 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:23:45,487 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:23:46,041 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:23:46,598 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:23:47,560 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:23:48,076 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:23:49,568 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 23:23:50,308 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 23:23:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:51,951 INFO L93 Difference]: Finished difference Result 15872 states and 50779 transitions. [2021-03-10 23:23:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 23:23:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:23:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:51,999 INFO L225 Difference]: With dead ends: 15872 [2021-03-10 23:23:51,999 INFO L226 Difference]: Without dead ends: 15783 [2021-03-10 23:23:52,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 20616.1ms TimeCoverageRelationStatistics Valid=994, Invalid=6316, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 23:23:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15783 states. [2021-03-10 23:23:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15783 to 9682. [2021-03-10 23:23:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9682 states, 9681 states have (on average 3.3449023861171367) internal successors, (32382), 9681 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 32382 transitions. [2021-03-10 23:23:52,231 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 32382 transitions. Word has length 36 [2021-03-10 23:23:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:52,231 INFO L480 AbstractCegarLoop]: Abstraction has 9682 states and 32382 transitions. [2021-03-10 23:23:52,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:23:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 32382 transitions. [2021-03-10 23:23:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:23:52,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:52,247 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:52,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-03-10 23:23:52,447 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1891498769, now seen corresponding path program 78 times [2021-03-10 23:23:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717116681] [2021-03-10 23:23:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:54,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717116681] [2021-03-10 23:23:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408808658] [2021-03-10 23:23:54,243 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 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 [2021-03-10 23:23:54,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:23:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:23:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:56,188 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:23:56,655 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:23:57,801 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:23:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:58,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:58,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-03-10 23:23:58,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351808332] [2021-03-10 23:23:58,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:23:58,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:58,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:23:58,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:58,127 INFO L87 Difference]: Start difference. First operand 9682 states and 32382 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:23:58,992 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-03-10 23:23:59,443 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:23:59,847 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-10 23:24:00,146 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:24:00,412 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:24:00,649 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:24:01,080 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:24:01,471 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:24:01,749 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:24:01,946 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-03-10 23:24:02,377 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:24:03,096 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-10 23:24:03,398 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-10 23:24:04,340 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:24:04,625 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:24:05,177 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:24:05,508 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:24:05,724 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:24:06,069 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:24:06,318 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:24:07,009 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:24:07,896 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-03-10 23:24:08,296 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:24:08,617 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:24:09,252 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:24:09,624 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:24:09,852 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:24:11,365 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 23:24:11,656 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:24:12,035 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:24:12,430 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:24:13,026 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:24:13,502 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:24:13,908 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:24:14,303 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:24:14,590 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:24:14,980 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:24:15,583 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:24:16,092 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-10 23:24:17,073 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:24:17,563 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:24:18,064 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-03-10 23:24:18,509 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 23:24:19,502 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:24:20,198 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-10 23:24:20,788 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:24:21,688 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:24:22,909 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-10 23:24:23,929 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:24:24,731 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:24:25,270 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:24:25,949 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:24:26,355 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:24:26,737 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:24:27,265 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:24:27,939 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:24:28,521 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:24:29,327 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:24:30,012 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:24:30,838 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:24:32,767 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:24:34,054 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:24:35,638 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:24:36,341 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 23:24:36,744 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-03-10 23:24:37,548 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:24:38,136 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:24:38,672 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 23:24:39,389 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:24:40,308 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 23:24:41,685 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:24:42,575 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:24:43,575 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:24:44,185 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-10 23:24:47,548 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 23:24:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:24:48,799 INFO L93 Difference]: Finished difference Result 16748 states and 53287 transitions. [2021-03-10 23:24:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-03-10 23:24:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 36 [2021-03-10 23:24:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:24:48,848 INFO L225 Difference]: With dead ends: 16748 [2021-03-10 23:24:48,849 INFO L226 Difference]: Without dead ends: 16463 [2021-03-10 23:24:48,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4805 ImplicationChecksByTransitivity, 32017.4ms TimeCoverageRelationStatistics Valid=1378, Invalid=12902, Unknown=0, NotChecked=0, Total=14280 [2021-03-10 23:24:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16463 states. [2021-03-10 23:24:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16463 to 9680. [2021-03-10 23:24:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9680 states, 9679 states have (on average 3.3453869201363777) internal successors, (32380), 9679 states have internal predecessors, (32380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:24:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9680 states to 9680 states and 32380 transitions. [2021-03-10 23:24:49,128 INFO L78 Accepts]: Start accepts. Automaton has 9680 states and 32380 transitions. Word has length 36 [2021-03-10 23:24:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:24:49,129 INFO L480 AbstractCegarLoop]: Abstraction has 9680 states and 32380 transitions. [2021-03-10 23:24:49,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-03-10 23:24:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 9680 states and 32380 transitions. [2021-03-10 23:24:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:24:49,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:24:49,147 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:24:49,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-03-10 23:24:49,347 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:24:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:24:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 628306257, now seen corresponding path program 79 times [2021-03-10 23:24:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:24:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064607614] [2021-03-10 23:24:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:24:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:24:51,130 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-10 23:24:51,348 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-10 23:24:51,555 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:24:51,776 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 23:24:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:24:51,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064607614] [2021-03-10 23:24:51,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426899911] [2021-03-10 23:24:51,897 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 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 [2021-03-10 23:24:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:24:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:24:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:24:53,665 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:24:53,967 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:24:54,720 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:24:55,510 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:24:56,066 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:24:56,592 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:24:57,265 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:24:57,604 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:24:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:24:57,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:24:57,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-03-10 23:24:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199317077] [2021-03-10 23:24:57,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 23:24:57,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:24:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 23:24:57,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:24:57,719 INFO L87 Difference]: Start difference. First operand 9680 states and 32380 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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) [2021-03-10 23:24:58,779 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-10 23:24:59,355 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:24:59,770 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:25:00,159 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:25:00,404 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:25:00,783 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:25:01,378 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:25:01,705 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-03-10 23:25:02,065 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-10 23:25:02,467 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:25:02,824 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:25:03,427 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 23:25:03,719 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:25:04,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:25:04,544 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:25:04,831 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:25:05,143 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:25:05,414 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:25:05,815 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:25:06,289 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 23:25:06,755 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:25:07,378 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-10 23:25:07,861 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-03-10 23:25:08,216 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 23:25:09,182 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:25:09,469 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:25:09,868 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 23:25:10,306 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:25:10,614 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:25:11,230 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:25:11,883 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:25:12,407 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-03-10 23:25:12,976 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 23:25:13,493 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:25:14,422 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-03-10 23:25:15,384 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-10 23:25:16,179 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 23:25:16,611 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:25:17,834 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 23:25:18,183 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:25:18,844 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:25:19,412 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:25:20,340 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 23:25:20,998 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-03-10 23:25:21,593 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-10 23:25:23,142 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:25:24,202 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:25:25,254 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:25:26,131 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:25:27,320 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 23:25:28,085 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:25:29,220 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-10 23:25:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:25:29,779 INFO L93 Difference]: Finished difference Result 17765 states and 56676 transitions. [2021-03-10 23:25:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-10 23:25:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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 36 [2021-03-10 23:25:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:25:29,824 INFO L225 Difference]: With dead ends: 17765 [2021-03-10 23:25:29,824 INFO L226 Difference]: Without dead ends: 17637 [2021-03-10 23:25:29,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 26971.9ms TimeCoverageRelationStatistics Valid=1455, Invalid=7475, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:25:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17637 states. [2021-03-10 23:25:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17637 to 9981. [2021-03-10 23:25:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9981 states, 9980 states have (on average 3.343086172344689) internal successors, (33364), 9980 states have internal predecessors, (33364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9981 states to 9981 states and 33364 transitions. [2021-03-10 23:25:30,088 INFO L78 Accepts]: Start accepts. Automaton has 9981 states and 33364 transitions. Word has length 36 [2021-03-10 23:25:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:25:30,088 INFO L480 AbstractCegarLoop]: Abstraction has 9981 states and 33364 transitions. [2021-03-10 23:25:30,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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) [2021-03-10 23:25:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9981 states and 33364 transitions. [2021-03-10 23:25:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:25:30,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:25:30,104 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:25:30,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:25:30,305 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:25:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:25:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1345874257, now seen corresponding path program 80 times [2021-03-10 23:25:30,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:25:30,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962092399] [2021-03-10 23:25:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:25:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:25:31,937 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-03-10 23:25:32,155 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 23:25:32,334 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 23:25:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:32,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962092399] [2021-03-10 23:25:32,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680121692] [2021-03-10 23:25:32,422 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 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 [2021-03-10 23:25:32,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:25:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:25:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:25:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:25:33,733 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:25:33,969 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:25:34,563 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:25:35,278 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:25:35,737 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-03-10 23:25:36,375 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:25:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:36,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:25:36,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-03-10 23:25:36,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557874212] [2021-03-10 23:25:36,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:25:36,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:25:36,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:25:36,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:25:36,744 INFO L87 Difference]: Start difference. First operand 9981 states and 33364 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:25:37,480 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-10 23:25:37,913 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:25:38,249 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:25:38,517 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:25:38,979 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:25:39,397 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 23:25:39,746 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-03-10 23:25:40,044 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:25:40,270 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:25:40,670 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:25:40,913 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:25:41,678 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:25:41,918 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:25:42,173 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:25:42,410 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:25:42,920 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:25:43,291 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 23:25:43,780 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-10 23:25:44,068 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-10 23:25:44,852 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:25:45,186 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:25:45,559 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:25:46,154 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:25:46,357 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:25:46,771 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:25:47,029 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 23:25:47,311 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:25:47,697 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:25:48,356 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 23:25:48,695 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:25:49,404 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 23:25:49,799 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 23:25:50,214 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:25:51,148 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:25:51,656 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:25:52,151 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:25:52,994 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-10 23:25:53,690 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:25:54,648 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:25:55,174 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:25:56,482 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:25:57,285 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:25:57,933 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:25:58,877 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 23:25:59,446 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:26:00,073 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:26:00,936 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:26:02,018 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:26:03,098 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:26:03,449 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-10 23:26:04,171 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:26:05,393 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:26:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:05,675 INFO L93 Difference]: Finished difference Result 19908 states and 63133 transitions. [2021-03-10 23:26:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 23:26:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:26:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:05,724 INFO L225 Difference]: With dead ends: 19908 [2021-03-10 23:26:05,724 INFO L226 Difference]: Without dead ends: 19739 [2021-03-10 23:26:05,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 24615.3ms TimeCoverageRelationStatistics Valid=1696, Invalid=7234, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 23:26:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2021-03-10 23:26:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 9926. [2021-03-10 23:26:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9925 states have (on average 3.345692695214106) internal successors, (33206), 9925 states have internal predecessors, (33206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 33206 transitions. [2021-03-10 23:26:06,005 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 33206 transitions. Word has length 36 [2021-03-10 23:26:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:06,005 INFO L480 AbstractCegarLoop]: Abstraction has 9926 states and 33206 transitions. [2021-03-10 23:26:06,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:26:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 33206 transitions. [2021-03-10 23:26:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:26:06,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:06,027 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:06,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:06,253 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -72516311, now seen corresponding path program 81 times [2021-03-10 23:26:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:06,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298296068] [2021-03-10 23:26:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:08,255 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:26:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:08,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298296068] [2021-03-10 23:26:08,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690470524] [2021-03-10 23:26:08,351 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 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 [2021-03-10 23:26:08,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:26:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:26:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:09,939 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:26:10,507 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:26:10,826 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:26:11,354 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:26:12,151 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:26:12,649 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 23:26:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-03-10 23:26:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850628381] [2021-03-10 23:26:12,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:26:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:26:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:26:12,921 INFO L87 Difference]: Start difference. First operand 9926 states and 33206 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:26:13,973 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:26:14,425 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2021-03-10 23:26:15,233 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:26:15,495 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 23:26:16,212 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:26:16,402 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-03-10 23:26:16,976 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:26:17,184 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:26:19,258 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:26:20,179 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:26:20,750 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:26:22,598 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:26:23,531 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:26:24,294 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:26:25,104 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:26:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:26,362 INFO L93 Difference]: Finished difference Result 12028 states and 39136 transitions. [2021-03-10 23:26:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:26:26,368 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 36 [2021-03-10 23:26:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:26,395 INFO L225 Difference]: With dead ends: 12028 [2021-03-10 23:26:26,396 INFO L226 Difference]: Without dead ends: 11914 [2021-03-10 23:26:26,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 11135.2ms TimeCoverageRelationStatistics Valid=453, Invalid=2739, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:26:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11914 states. [2021-03-10 23:26:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11914 to 10114. [2021-03-10 23:26:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 3.347176901018491) internal successors, (33850), 10113 states have internal predecessors, (33850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 33850 transitions. [2021-03-10 23:26:26,635 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 33850 transitions. Word has length 36 [2021-03-10 23:26:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:26,635 INFO L480 AbstractCegarLoop]: Abstraction has 10114 states and 33850 transitions. [2021-03-10 23:26:26,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-03-10 23:26:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 33850 transitions. [2021-03-10 23:26:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:26:26,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:26,652 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:26,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-03-10 23:26:26,853 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1227510575, now seen corresponding path program 82 times [2021-03-10 23:26:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925625808] [2021-03-10 23:26:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:28,708 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:26:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925625808] [2021-03-10 23:26:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499619302] [2021-03-10 23:26:28,804 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 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 [2021-03-10 23:26:28,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:28,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 23:26:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:30,367 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:26:30,926 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:26:31,437 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 23:26:31,737 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:26:32,029 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:26:32,461 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:26:33,009 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:26:33,657 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:26:33,973 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:26:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:34,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:34,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-03-10 23:26:34,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845731097] [2021-03-10 23:26:34,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:26:34,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:26:34,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:26:34,088 INFO L87 Difference]: Start difference. First operand 10114 states and 33850 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:26:35,277 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-03-10 23:26:35,693 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:26:37,197 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:26:37,560 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-10 23:26:38,237 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:26:38,414 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:26:38,986 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:26:39,691 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 23:26:41,072 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:26:41,731 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:26:42,238 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:26:43,076 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:26:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:43,769 INFO L93 Difference]: Finished difference Result 12924 states and 42003 transitions. [2021-03-10 23:26:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:26:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 36 [2021-03-10 23:26:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:43,806 INFO L225 Difference]: With dead ends: 12924 [2021-03-10 23:26:43,806 INFO L226 Difference]: Without dead ends: 12836 [2021-03-10 23:26:43,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 10617.3ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:26:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12836 states. [2021-03-10 23:26:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12836 to 10164. [2021-03-10 23:26:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10164 states, 10163 states have (on average 3.3480271573354323) internal successors, (34026), 10163 states have internal predecessors, (34026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10164 states to 10164 states and 34026 transitions. [2021-03-10 23:26:44,033 INFO L78 Accepts]: Start accepts. Automaton has 10164 states and 34026 transitions. Word has length 36 [2021-03-10 23:26:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:44,033 INFO L480 AbstractCegarLoop]: Abstraction has 10164 states and 34026 transitions. [2021-03-10 23:26:44,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-03-10 23:26:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10164 states and 34026 transitions. [2021-03-10 23:26:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:26:44,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:44,049 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:44,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:44,250 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1040210897, now seen corresponding path program 83 times [2021-03-10 23:26:44,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:44,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077009907] [2021-03-10 23:26:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:45,624 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 23:26:45,976 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:26:46,166 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:26:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077009907] [2021-03-10 23:26:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031557380] [2021-03-10 23:26:46,249 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 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 [2021-03-10 23:26:46,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:26:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:26:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:47,542 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:26:48,016 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:26:48,945 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 23:26:49,459 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:26:50,054 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:26:51,448 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-03-10 23:26:53,055 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-03-10 23:26:53,413 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 23:26:53,722 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:26:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:53,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:53,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-03-10 23:26:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273748249] [2021-03-10 23:26:53,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:26:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:26:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:26:53,827 INFO L87 Difference]: Start difference. First operand 10164 states and 34026 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-03-10 23:26:54,722 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:26:54,932 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-10 23:26:55,277 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:26:55,499 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2021-03-10 23:26:55,903 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 23:26:56,192 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-03-10 23:26:56,619 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:26:57,089 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:26:57,443 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:26:57,910 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:26:58,245 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:26:58,491 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-03-10 23:26:58,806 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:26:59,251 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:26:59,475 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:26:59,897 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:27:00,569 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:27:01,011 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:27:01,284 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-10 23:27:01,532 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:27:01,892 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:27:02,506 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 23:27:02,994 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-10 23:27:03,469 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-10 23:27:03,735 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:27:03,996 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:27:04,797 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:27:05,138 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:27:05,636 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:27:06,034 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:27:06,295 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:27:06,572 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:27:07,102 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:27:07,528 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:27:07,712 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:27:08,158 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:27:08,601 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:27:08,842 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:27:09,771 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 23:27:10,681 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 23:27:11,903 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-10 23:27:12,588 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-03-10 23:27:13,485 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 23:27:14,708 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 23:27:15,646 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-03-10 23:27:16,864 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-03-10 23:27:18,035 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-03-10 23:27:19,136 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-03-10 23:27:20,438 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-03-10 23:27:20,873 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:27:21,969 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 Received shutdown request... [2021-03-10 23:27:24,082 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-03-10 23:27:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-10 23:27:24,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-03-10 23:27:24,283 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:27:24,286 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:27:24,286 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:27:24 BasicIcfg [2021-03-10 23:27:24,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:27:24,287 INFO L168 Benchmark]: Toolchain (without parser) took 812938.83 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 236.7 MB in the beginning and 842.3 MB in the end (delta: -605.7 MB). Peak memory consumption was 583.7 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:24,287 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:24,287 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:24,287 INFO L168 Benchmark]: Boogie Preprocessor took 13.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 975.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:27:24,287 INFO L168 Benchmark]: RCFGBuilder took 315.19 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 233.9 MB in the end (delta: -283.2 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:24,288 INFO L168 Benchmark]: TraceAbstraction took 812582.81 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 233.1 MB in the beginning and 842.3 MB in the end (delta: -609.2 MB). Peak memory consumption was 578.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:27:24,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 975.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 315.19 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 233.9 MB in the end (delta: -283.2 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 812582.81 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 233.1 MB in the beginning and 842.3 MB in the end (delta: -609.2 MB). Peak memory consumption was 578.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 78). Cancelled while BasicCegarLoop was constructing difference of abstraction (10164states) and FLOYD_HOARE automaton (currently 72 states, 36 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 82 for 1220ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812477.9ms, OverallIterations: 86, TraceHistogramMax: 4, EmptinessCheckTime: 1105.6ms, AutomataDifference: 590286.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2625 SDtfs, 26347 SDslu, 33851 SDs, 0 SdLazy, 155139 SolverSat, 12757 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104762.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6773 GetRequests, 1583 SyntacticMatches, 182 SemanticMatches, 5007 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100711 ImplicationChecksByTransitivity, 470455.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10164occurred in iteration=85, InterpolantAutomatonStates: 4264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16673.2ms AutomataMinimizationTime, 85 MinimizatonAttempts, 357113 StatesRemovedByMinimization, 83 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 320.5ms SsaConstructionTime, 1056.4ms SatisfiabilityAnalysisTime, 184581.6ms InterpolantComputationTime, 5710 NumberOfCodeBlocks, 5710 NumberOfCodeBlocksAsserted, 333 NumberOfCheckSat, 5542 ConstructedInterpolants, 0 QuantifiedInterpolants, 114710 SizeOfPredicates, 523 NumberOfNonLiveVariables, 5184 ConjunctsInSsa, 1620 ConjunctsInUnsatCore, 168 InterpolantComputations, 4 PerfectInterpolantSequences, 124/2524 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