/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:16:31,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:16:31,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:16:31,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:16:31,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:16:31,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:16:31,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:16:31,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:16:31,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:16:31,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:16:31,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:16:31,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:16:31,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:16:31,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:16:31,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:16:31,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:16:31,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:16:31,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 16:16:31,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:16:31,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:16:31,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:16:31,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:16:31,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:16:31,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:16:31,773 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:16:31,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:16:31,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:16:31,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:16:31,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:16:31,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:16:31,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:16:31,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:16:31,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:16:31,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:16:31,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:16:31,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:16:31,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:16:31,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:16:31,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:16:32,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:16:32,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:16:32,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:16:32,243 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:16:32,246 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:16:32,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-05-03 16:16:32,247 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-05-03 16:16:32,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:16:32,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:16:32,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:16:32,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:16:32,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:16:32,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:16:32,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:16:32,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:16:32,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:16:32,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... [2021-05-03 16:16:32,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:16:32,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:16:32,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:16:32,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:16:32,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:16:32,407 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:16:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:16:32,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:16:32,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:16:32,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:16:32,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:16:32,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:16:32,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:16:32,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:16:32,410 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:16:32,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:16:32,692 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:16:32,695 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:16:32 BoogieIcfgContainer [2021-05-03 16:16:32,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:16:32,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:16:32,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:16:32,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:16:32,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:16:32" (1/2) ... [2021-05-03 16:16:32,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9f0353 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:16:32, skipping insertion in model container [2021-05-03 16:16:32,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:16:32" (2/2) ... [2021-05-03 16:16:32,704 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-05-03 16:16:32,709 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:16:32,710 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:16:32,714 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:16:32,715 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:16:32,748 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 16:16:32,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 16:16:32,795 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:16:32,795 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:16:32,795 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:16:32,796 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:16:32,796 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:16:32,796 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:16:32,796 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:16:32,796 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:16:32,807 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-05-03 16:16:32,818 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 16:16:32,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:32,829 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:32,829 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-05-03 16:16:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:32,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206037699] [2021-05-03 16:16:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:32,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206037699] [2021-05-03 16:16:32,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:32,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:16:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995444675] [2021-05-03 16:16:32,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:16:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:16:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:33,005 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:33,042 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-05-03 16:16:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:16:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 16:16:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:33,053 INFO L225 Difference]: With dead ends: 38 [2021-05-03 16:16:33,053 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 16:16:33,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:16:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 16:16:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 16:16:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-05-03 16:16:33,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-05-03 16:16:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:33,096 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-05-03 16:16:33,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-05-03 16:16:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:16:33,098 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:33,099 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:33,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:16:33,099 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-05-03 16:16:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:33,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643720693] [2021-05-03 16:16:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:33,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643720693] [2021-05-03 16:16:33,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:33,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:16:33,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84436032] [2021-05-03 16:16:33,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:16:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:33,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:16:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:16:33,218 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:33,281 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-05-03 16:16:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:16:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 16:16:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:33,284 INFO L225 Difference]: With dead ends: 62 [2021-05-03 16:16:33,285 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 16:16:33,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:16:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 16:16:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-03 16:16:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-05-03 16:16:33,295 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-05-03 16:16:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:33,296 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-05-03 16:16:33,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-05-03 16:16:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:16:33,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:33,297 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:33,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:16:33,298 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-05-03 16:16:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:33,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41494885] [2021-05-03 16:16:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:33,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41494885] [2021-05-03 16:16:33,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:16:33,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:16:33,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483127245] [2021-05-03 16:16:33,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:16:33,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:16:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:16:33,400 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:33,449 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-05-03 16:16:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:16:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:16:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:33,459 INFO L225 Difference]: With dead ends: 87 [2021-05-03 16:16:33,460 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 16:16:33,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:16:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 16:16:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-05-03 16:16:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-05-03 16:16:33,468 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-05-03 16:16:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:33,468 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-05-03 16:16:33,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-05-03 16:16:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:33,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:33,478 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:33,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:16:33,478 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-05-03 16:16:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:33,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410476531] [2021-05-03 16:16:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:16:33,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410476531] [2021-05-03 16:16:33,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555223482] [2021-05-03 16:16:33,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:33,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:33,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:16:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:34,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:34,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 16:16:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453301677] [2021-05-03 16:16:34,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:16:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:16:34,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:16:34,666 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:35,162 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-05-03 16:16:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:16:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:35,165 INFO L225 Difference]: With dead ends: 116 [2021-05-03 16:16:35,165 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 16:16:35,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:16:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 16:16:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-05-03 16:16:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-05-03 16:16:35,178 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-05-03 16:16:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:35,178 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-05-03 16:16:35,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-05-03 16:16:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:35,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:35,180 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:35,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:35,401 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-05-03 16:16:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:35,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783160267] [2021-05-03 16:16:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:35,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783160267] [2021-05-03 16:16:35,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420775247] [2021-05-03 16:16:35,717 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 [2021-05-03 16:16:35,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:16:35,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:16:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:36,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:36,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 16:16:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696341737] [2021-05-03 16:16:36,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:16:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:16:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:16:36,367 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:37,031 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-05-03 16:16:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:16:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:37,033 INFO L225 Difference]: With dead ends: 163 [2021-05-03 16:16:37,033 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 16:16:37,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 952.6ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:16:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 16:16:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-05-03 16:16:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-05-03 16:16:37,042 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-05-03 16:16:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:37,043 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-05-03 16:16:37,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-05-03 16:16:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:37,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:37,044 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:37,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:37,258 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-05-03 16:16:37,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:37,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919395173] [2021-05-03 16:16:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919395173] [2021-05-03 16:16:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967592081] [2021-05-03 16:16:37,513 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 [2021-05-03 16:16:37,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:16:37,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:16:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:38,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:38,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 16:16:38,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781874500] [2021-05-03 16:16:38,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:16:38,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:38,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:16:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:16:38,065 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:39,065 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-05-03 16:16:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:16:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:39,067 INFO L225 Difference]: With dead ends: 201 [2021-05-03 16:16:39,067 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 16:16:39,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1109.3ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:16:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 16:16:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-05-03 16:16:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-05-03 16:16:39,075 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-05-03 16:16:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:39,076 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-05-03 16:16:39,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-05-03 16:16:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:39,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:39,077 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:39,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:16:39,293 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-05-03 16:16:39,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:39,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899804913] [2021-05-03 16:16:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:39,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899804913] [2021-05-03 16:16:39,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829415512] [2021-05-03 16:16:39,524 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 [2021-05-03 16:16:39,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:16:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:39,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:39,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 16:16:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237310988] [2021-05-03 16:16:39,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:16:39,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:16:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:16:39,985 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:40,505 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-05-03 16:16:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:16:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:40,508 INFO L225 Difference]: With dead ends: 144 [2021-05-03 16:16:40,508 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 16:16:40,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:16:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 16:16:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-05-03 16:16:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-05-03 16:16:40,518 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-05-03 16:16:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:40,518 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-05-03 16:16:40,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-05-03 16:16:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:40,519 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:40,519 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:40,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:40,733 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-05-03 16:16:40,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:40,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458101453] [2021-05-03 16:16:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:40,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458101453] [2021-05-03 16:16:40,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447265605] [2021-05-03 16:16:40,942 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) [2021-05-03 16:16:40,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:16:40,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:16:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:41,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:41,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-03 16:16:41,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9440727] [2021-05-03 16:16:41,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:16:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:16:41,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:16:41,370 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:42,219 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-05-03 16:16:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:16:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:42,221 INFO L225 Difference]: With dead ends: 199 [2021-05-03 16:16:42,221 INFO L226 Difference]: Without dead ends: 167 [2021-05-03 16:16:42,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 824.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:16:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-03 16:16:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-05-03 16:16:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-05-03 16:16:42,228 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-05-03 16:16:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:42,229 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-05-03 16:16:42,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-05-03 16:16:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:42,230 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:42,230 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:42,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 16:16:42,445 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-05-03 16:16:42,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:42,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068304367] [2021-05-03 16:16:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:42,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068304367] [2021-05-03 16:16:42,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901491805] [2021-05-03 16:16:42,603 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 [2021-05-03 16:16:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:16:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:43,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:43,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 16:16:43,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428047882] [2021-05-03 16:16:43,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:16:43,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:43,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:16:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:16:43,018 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:43,463 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-05-03 16:16:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:16:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:43,464 INFO L225 Difference]: With dead ends: 172 [2021-05-03 16:16:43,464 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 16:16:43,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:16:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 16:16:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-05-03 16:16:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-05-03 16:16:43,473 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-05-03 16:16:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:43,473 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-05-03 16:16:43,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-05-03 16:16:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:16:43,474 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:43,474 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:43,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:16:43,689 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:43,690 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-05-03 16:16:43,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:43,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562601486] [2021-05-03 16:16:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:43,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562601486] [2021-05-03 16:16:43,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332018173] [2021-05-03 16:16:43,855 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 [2021-05-03 16:16:43,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:43,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:43,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 16:16:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:44,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:44,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 16:16:44,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213393525] [2021-05-03 16:16:44,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:16:44,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:44,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:16:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:16:44,217 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:44,702 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-05-03 16:16:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:16:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:16:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:44,704 INFO L225 Difference]: With dead ends: 214 [2021-05-03 16:16:44,705 INFO L226 Difference]: Without dead ends: 172 [2021-05-03 16:16:44,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:16:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-03 16:16:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-05-03 16:16:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-05-03 16:16:44,710 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-05-03 16:16:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-05-03 16:16:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-05-03 16:16:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:16:44,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:44,711 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:44,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:44,925 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-05-03 16:16:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:44,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408207098] [2021-05-03 16:16:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:16:45,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408207098] [2021-05-03 16:16:45,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108052825] [2021-05-03 16:16:45,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:16:45,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:16:45,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:16:45,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:45,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:45,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-05-03 16:16:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963535870] [2021-05-03 16:16:45,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:16:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:16:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:16:45,527 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:45,903 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-05-03 16:16:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:16:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:16:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:45,905 INFO L225 Difference]: With dead ends: 186 [2021-05-03 16:16:45,905 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 16:16:45,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:16:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 16:16:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-05-03 16:16:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-05-03 16:16:45,911 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-05-03 16:16:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:45,911 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-05-03 16:16:45,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-05-03 16:16:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:16:45,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:45,912 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:46,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 16:16:46,129 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-05-03 16:16:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:46,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520562282] [2021-05-03 16:16:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:16:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520562282] [2021-05-03 16:16:46,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569624845] [2021-05-03 16:16:46,314 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 [2021-05-03 16:16:46,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:16:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:16:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:46,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:46,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-05-03 16:16:46,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490213581] [2021-05-03 16:16:46,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:16:46,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:16:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:16:46,904 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:47,472 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-05-03 16:16:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:16:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:16:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:47,474 INFO L225 Difference]: With dead ends: 183 [2021-05-03 16:16:47,474 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 16:16:47,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 831.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:16:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 16:16:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-05-03 16:16:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-05-03 16:16:47,480 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-05-03 16:16:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:47,480 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-05-03 16:16:47,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-05-03 16:16:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:16:47,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:47,482 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:47,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 16:16:47,701 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:47,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-05-03 16:16:47,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:47,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872394897] [2021-05-03 16:16:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:16:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872394897] [2021-05-03 16:16:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657755085] [2021-05-03 16:16:47,900 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) [2021-05-03 16:16:47,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:16:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:48,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:48,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-05-03 16:16:48,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670571439] [2021-05-03 16:16:48,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:16:48,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:16:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:16:48,546 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:49,375 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-05-03 16:16:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:16:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:16:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:49,376 INFO L225 Difference]: With dead ends: 196 [2021-05-03 16:16:49,376 INFO L226 Difference]: Without dead ends: 172 [2021-05-03 16:16:49,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1084.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:16:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-03 16:16:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-05-03 16:16:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-05-03 16:16:49,380 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-05-03 16:16:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:49,381 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-05-03 16:16:49,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-05-03 16:16:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:16:49,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:49,382 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:49,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:49,592 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-05-03 16:16:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:49,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143016975] [2021-05-03 16:16:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:49,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143016975] [2021-05-03 16:16:49,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669550922] [2021-05-03 16:16:49,802 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 [2021-05-03 16:16:49,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:16:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:16:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:50,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:50,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 16:16:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813831420] [2021-05-03 16:16:50,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:16:50,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:16:50,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:16:50,234 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:50,675 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-05-03 16:16:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:16:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:16:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:50,676 INFO L225 Difference]: With dead ends: 168 [2021-05-03 16:16:50,676 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 16:16:50,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:16:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 16:16:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-05-03 16:16:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-05-03 16:16:50,682 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-05-03 16:16:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:50,682 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-05-03 16:16:50,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-05-03 16:16:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:16:50,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:50,682 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:50,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:16:50,889 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-05-03 16:16:50,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:50,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600127850] [2021-05-03 16:16:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:51,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600127850] [2021-05-03 16:16:51,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001648452] [2021-05-03 16:16:51,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:16:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:51,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:51,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 16:16:51,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874695150] [2021-05-03 16:16:51,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:16:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:16:51,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:16:51,433 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:51,853 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-05-03 16:16:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:16:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:16:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:51,855 INFO L225 Difference]: With dead ends: 163 [2021-05-03 16:16:51,855 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 16:16:51,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:16:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 16:16:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-05-03 16:16:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-05-03 16:16:51,860 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-05-03 16:16:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:51,860 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-05-03 16:16:51,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-05-03 16:16:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:51,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:51,861 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:52,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:52,089 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-05-03 16:16:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:52,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201521743] [2021-05-03 16:16:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201521743] [2021-05-03 16:16:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276883883] [2021-05-03 16:16:52,312 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 [2021-05-03 16:16:52,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:16:52,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:16:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:52,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 16:16:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854631558] [2021-05-03 16:16:52,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:16:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:16:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:16:52,870 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:53,651 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-05-03 16:16:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:16:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:16:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:53,653 INFO L225 Difference]: With dead ends: 277 [2021-05-03 16:16:53,653 INFO L226 Difference]: Without dead ends: 263 [2021-05-03 16:16:53,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:16:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-03 16:16:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-05-03 16:16:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-05-03 16:16:53,663 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-05-03 16:16:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:53,663 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-05-03 16:16:53,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-05-03 16:16:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:53,664 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:53,664 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:53,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:16:53,869 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-05-03 16:16:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:53,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621287472] [2021-05-03 16:16:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:54,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621287472] [2021-05-03 16:16:54,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826277312] [2021-05-03 16:16:54,100 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 [2021-05-03 16:16:54,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:16:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:16:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:54,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:54,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:16:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114605919] [2021-05-03 16:16:54,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:16:54,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:16:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:16:54,661 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:56,180 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-05-03 16:16:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 16:16:56,181 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:16:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:56,182 INFO L225 Difference]: With dead ends: 345 [2021-05-03 16:16:56,182 INFO L226 Difference]: Without dead ends: 331 [2021-05-03 16:16:56,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1661.6ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:16:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-03 16:16:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-05-03 16:16:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-05-03 16:16:56,191 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-05-03 16:16:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:56,191 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-05-03 16:16:56,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-05-03 16:16:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:56,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:56,192 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:56,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:16:56,409 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-05-03 16:16:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:56,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770324174] [2021-05-03 16:16:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770324174] [2021-05-03 16:16:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475053870] [2021-05-03 16:16:56,623 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 [2021-05-03 16:16:56,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:16:56,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:56,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:16:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:16:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:57,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:16:57,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:16:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546695485] [2021-05-03 16:16:57,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:16:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:16:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:16:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:16:57,234 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:16:59,417 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-05-03 16:16:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 16:16:59,418 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:16:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:16:59,420 INFO L225 Difference]: With dead ends: 351 [2021-05-03 16:16:59,420 INFO L226 Difference]: Without dead ends: 337 [2021-05-03 16:16:59,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 2041.5ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 16:16:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-03 16:16:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-05-03 16:16:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-05-03 16:16:59,429 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-05-03 16:16:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:16:59,429 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-05-03 16:16:59,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:16:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-05-03 16:16:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:16:59,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:16:59,430 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:16:59,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 16:16:59,645 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:16:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:16:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-05-03 16:16:59,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:16:59,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495608472] [2021-05-03 16:16:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:16:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:16:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:16:59,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495608472] [2021-05-03 16:16:59,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783945609] [2021-05-03 16:16:59,861 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 [2021-05-03 16:16:59,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:16:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:16:59,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:16:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:00,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:00,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-05-03 16:17:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372618465] [2021-05-03 16:17:00,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:17:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:17:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:17:00,579 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:04,215 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-05-03 16:17:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 16:17:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:04,218 INFO L225 Difference]: With dead ends: 411 [2021-05-03 16:17:04,218 INFO L226 Difference]: Without dead ends: 366 [2021-05-03 16:17:04,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 3418.2ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 16:17:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-03 16:17:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-05-03 16:17:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-05-03 16:17:04,228 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-05-03 16:17:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:04,228 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-05-03 16:17:04,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-05-03 16:17:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:04,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:04,229 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:04,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:04,445 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-05-03 16:17:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:04,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667244826] [2021-05-03 16:17:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:04,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667244826] [2021-05-03 16:17:04,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630716678] [2021-05-03 16:17:04,661 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) [2021-05-03 16:17:04,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:17:04,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:05,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:05,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:17:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129373230] [2021-05-03 16:17:05,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:17:05,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:17:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:17:05,255 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:06,349 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-05-03 16:17:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:17:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:06,360 INFO L225 Difference]: With dead ends: 331 [2021-05-03 16:17:06,360 INFO L226 Difference]: Without dead ends: 317 [2021-05-03 16:17:06,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1197.5ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:17:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-03 16:17:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-05-03 16:17:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-05-03 16:17:06,368 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-05-03 16:17:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:06,368 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-05-03 16:17:06,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-05-03 16:17:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:06,369 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:06,369 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:06,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:06,593 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-05-03 16:17:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:06,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323631577] [2021-05-03 16:17:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323631577] [2021-05-03 16:17:06,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509088368] [2021-05-03 16:17:06,842 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 [2021-05-03 16:17:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:07,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:07,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-03 16:17:07,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022968181] [2021-05-03 16:17:07,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:17:07,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:07,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:17:07,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:17:07,333 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:09,034 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-05-03 16:17:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 16:17:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:09,037 INFO L225 Difference]: With dead ends: 389 [2021-05-03 16:17:09,037 INFO L226 Difference]: Without dead ends: 357 [2021-05-03 16:17:09,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1621.3ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 16:17:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-03 16:17:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-05-03 16:17:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-05-03 16:17:09,046 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-05-03 16:17:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:09,046 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-05-03 16:17:09,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-05-03 16:17:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:09,047 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:09,047 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:09,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 16:17:09,261 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-05-03 16:17:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:09,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781456567] [2021-05-03 16:17:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:09,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781456567] [2021-05-03 16:17:09,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115024871] [2021-05-03 16:17:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:17:09,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:17:09,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:10,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:10,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 16:17:10,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703980415] [2021-05-03 16:17:10,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:10,082 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:11,401 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-05-03 16:17:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:17:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:11,403 INFO L225 Difference]: With dead ends: 364 [2021-05-03 16:17:11,403 INFO L226 Difference]: Without dead ends: 322 [2021-05-03 16:17:11,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1492.1ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:17:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-03 16:17:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-05-03 16:17:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-05-03 16:17:11,412 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-05-03 16:17:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:11,412 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-05-03 16:17:11,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-05-03 16:17:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:11,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:11,413 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:11,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:11,633 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-05-03 16:17:11,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:11,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700378815] [2021-05-03 16:17:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700378815] [2021-05-03 16:17:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047797841] [2021-05-03 16:17:11,867 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 [2021-05-03 16:17:11,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:17:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:12,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:12,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:17:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829503972] [2021-05-03 16:17:12,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:17:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:17:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:17:12,444 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:13,674 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-05-03 16:17:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:17:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:13,676 INFO L225 Difference]: With dead ends: 410 [2021-05-03 16:17:13,676 INFO L226 Difference]: Without dead ends: 396 [2021-05-03 16:17:13,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1320.2ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 16:17:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-03 16:17:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-05-03 16:17:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-05-03 16:17:13,686 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-05-03 16:17:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:13,686 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-05-03 16:17:13,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-05-03 16:17:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:13,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:13,687 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:13,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 16:17:13,901 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-05-03 16:17:13,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:13,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930160113] [2021-05-03 16:17:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:14,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930160113] [2021-05-03 16:17:14,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656360026] [2021-05-03 16:17:14,125 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 [2021-05-03 16:17:14,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:17:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:14,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:14,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-03 16:17:14,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849256097] [2021-05-03 16:17:14,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:17:14,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:17:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:17:14,653 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:16,643 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-05-03 16:17:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:17:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:16,645 INFO L225 Difference]: With dead ends: 464 [2021-05-03 16:17:16,645 INFO L226 Difference]: Without dead ends: 432 [2021-05-03 16:17:16,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1825.7ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 16:17:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-03 16:17:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-05-03 16:17:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-05-03 16:17:16,654 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-05-03 16:17:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:16,655 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-05-03 16:17:16,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-05-03 16:17:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:16,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:16,656 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:16,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:16,869 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-05-03 16:17:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:16,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186050290] [2021-05-03 16:17:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:17,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186050290] [2021-05-03 16:17:17,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904731711] [2021-05-03 16:17:17,115 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 [2021-05-03 16:17:17,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:17:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:17,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:17,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 16:17:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195660440] [2021-05-03 16:17:17,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:17,663 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:19,077 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-05-03 16:17:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:17:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:19,079 INFO L225 Difference]: With dead ends: 416 [2021-05-03 16:17:19,079 INFO L226 Difference]: Without dead ends: 374 [2021-05-03 16:17:19,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:17:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-03 16:17:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-05-03 16:17:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-05-03 16:17:19,086 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-05-03 16:17:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:19,087 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-05-03 16:17:19,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-05-03 16:17:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:19,087 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:19,087 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:19,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:19,309 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-05-03 16:17:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:19,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56689115] [2021-05-03 16:17:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56689115] [2021-05-03 16:17:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595767415] [2021-05-03 16:17:19,539 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 [2021-05-03 16:17:19,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:17:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:20,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:20,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 16:17:20,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45501229] [2021-05-03 16:17:20,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:20,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:20,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:20,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:20,063 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:21,547 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-05-03 16:17:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:17:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:21,549 INFO L225 Difference]: With dead ends: 478 [2021-05-03 16:17:21,550 INFO L226 Difference]: Without dead ends: 436 [2021-05-03 16:17:21,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1484.8ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:17:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-03 16:17:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-05-03 16:17:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-05-03 16:17:21,557 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-05-03 16:17:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:21,557 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-05-03 16:17:21,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-05-03 16:17:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:21,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:21,558 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:21,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 16:17:21,769 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-05-03 16:17:21,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:21,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105571587] [2021-05-03 16:17:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105571587] [2021-05-03 16:17:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134621262] [2021-05-03 16:17:21,945 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 [2021-05-03 16:17:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:22,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:22,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 16:17:22,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256530055] [2021-05-03 16:17:22,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:22,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:22,412 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:23,500 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-05-03 16:17:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:17:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:23,503 INFO L225 Difference]: With dead ends: 535 [2021-05-03 16:17:23,503 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 16:17:23,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1159.4ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:17:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 16:17:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-05-03 16:17:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-05-03 16:17:23,511 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-05-03 16:17:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:23,511 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-05-03 16:17:23,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-05-03 16:17:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:23,512 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:23,512 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:23,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:23,729 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-05-03 16:17:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:23,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742796831] [2021-05-03 16:17:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:23,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742796831] [2021-05-03 16:17:23,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214317470] [2021-05-03 16:17:23,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:23,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:17:23,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:23,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:23,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:24,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:24,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:24,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762541836] [2021-05-03 16:17:24,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:24,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:24,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:24,517 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:26,565 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-05-03 16:17:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:17:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:26,567 INFO L225 Difference]: With dead ends: 600 [2021-05-03 16:17:26,568 INFO L226 Difference]: Without dead ends: 580 [2021-05-03 16:17:26,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1971.0ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 16:17:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-05-03 16:17:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-05-03 16:17:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-05-03 16:17:26,576 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-05-03 16:17:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:26,576 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-05-03 16:17:26,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-05-03 16:17:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:26,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:26,577 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:26,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 16:17:26,793 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-05-03 16:17:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:26,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411830799] [2021-05-03 16:17:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411830799] [2021-05-03 16:17:26,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558508416] [2021-05-03 16:17:26,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:27,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:17:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:27,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:27,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:27,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589532201] [2021-05-03 16:17:27,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:27,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:27,476 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:29,332 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-05-03 16:17:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 16:17:29,332 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:29,334 INFO L225 Difference]: With dead ends: 651 [2021-05-03 16:17:29,334 INFO L226 Difference]: Without dead ends: 615 [2021-05-03 16:17:29,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1739.2ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 16:17:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-03 16:17:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-05-03 16:17:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-05-03 16:17:29,344 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-05-03 16:17:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:29,344 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-05-03 16:17:29,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-05-03 16:17:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:29,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:29,345 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:29,561 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-05-03 16:17:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584215786] [2021-05-03 16:17:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584215786] [2021-05-03 16:17:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132523859] [2021-05-03 16:17:29,787 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 [2021-05-03 16:17:29,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:17:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:30,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:30,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 16:17:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233018138] [2021-05-03 16:17:30,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:30,326 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:30,941 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-05-03 16:17:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:17:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:30,944 INFO L225 Difference]: With dead ends: 387 [2021-05-03 16:17:30,944 INFO L226 Difference]: Without dead ends: 373 [2021-05-03 16:17:30,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:17:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-03 16:17:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-05-03 16:17:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-05-03 16:17:30,951 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-05-03 16:17:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:30,951 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-05-03 16:17:30,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-05-03 16:17:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:30,952 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:30,952 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:31,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-03 16:17:31,165 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-05-03 16:17:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:31,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100244322] [2021-05-03 16:17:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:31,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100244322] [2021-05-03 16:17:31,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295669026] [2021-05-03 16:17:31,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:31,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:17:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:31,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:31,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 16:17:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270429251] [2021-05-03 16:17:31,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:17:31,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:17:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:17:31,939 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:32,930 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-05-03 16:17:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:17:32,931 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:32,932 INFO L225 Difference]: With dead ends: 462 [2021-05-03 16:17:32,932 INFO L226 Difference]: Without dead ends: 448 [2021-05-03 16:17:32,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:17:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-03 16:17:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-05-03 16:17:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-05-03 16:17:32,941 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-05-03 16:17:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-05-03 16:17:32,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-05-03 16:17:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:32,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:32,942 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:33,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 16:17:33,157 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-05-03 16:17:33,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:33,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338189095] [2021-05-03 16:17:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:33,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338189095] [2021-05-03 16:17:33,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913719669] [2021-05-03 16:17:33,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:33,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:17:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:33,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:33,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:33,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:33,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967992472] [2021-05-03 16:17:33,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:33,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:33,861 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:35,484 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-05-03 16:17:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:17:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:35,487 INFO L225 Difference]: With dead ends: 541 [2021-05-03 16:17:35,487 INFO L226 Difference]: Without dead ends: 509 [2021-05-03 16:17:35,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1552.4ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:17:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-03 16:17:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-05-03 16:17:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-05-03 16:17:35,495 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-05-03 16:17:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:35,495 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-05-03 16:17:35,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-05-03 16:17:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:35,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:35,496 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:35,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:35,721 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-05-03 16:17:35,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:35,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739145825] [2021-05-03 16:17:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:35,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739145825] [2021-05-03 16:17:35,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936055665] [2021-05-03 16:17:35,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:36,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:36,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460284925] [2021-05-03 16:17:36,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:36,499 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:37,649 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-05-03 16:17:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:17:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:37,651 INFO L225 Difference]: With dead ends: 489 [2021-05-03 16:17:37,652 INFO L226 Difference]: Without dead ends: 447 [2021-05-03 16:17:37,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:17:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-03 16:17:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-05-03 16:17:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-05-03 16:17:37,658 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-05-03 16:17:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:37,658 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-05-03 16:17:37,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-05-03 16:17:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:37,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:37,659 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:37,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:37,885 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-05-03 16:17:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:37,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981351668] [2021-05-03 16:17:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:38,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981351668] [2021-05-03 16:17:38,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630627915] [2021-05-03 16:17:38,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:17:38,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:17:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:38,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:38,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 16:17:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399788634] [2021-05-03 16:17:38,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:38,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:38,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:38,663 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:39,603 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-05-03 16:17:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:17:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:39,605 INFO L225 Difference]: With dead ends: 464 [2021-05-03 16:17:39,605 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 16:17:39,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1137.6ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:17:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 16:17:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-05-03 16:17:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-05-03 16:17:39,611 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-05-03 16:17:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:39,611 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-05-03 16:17:39,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-05-03 16:17:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:39,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:39,612 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:39,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 16:17:39,825 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-05-03 16:17:39,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:39,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504519629] [2021-05-03 16:17:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504519629] [2021-05-03 16:17:40,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045418929] [2021-05-03 16:17:40,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:40,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:17:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:40,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:40,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:40,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465735889] [2021-05-03 16:17:40,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:40,588 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:42,266 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-05-03 16:17:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:17:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:42,269 INFO L225 Difference]: With dead ends: 569 [2021-05-03 16:17:42,269 INFO L226 Difference]: Without dead ends: 537 [2021-05-03 16:17:42,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1643.9ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:17:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-03 16:17:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-05-03 16:17:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-05-03 16:17:42,277 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-05-03 16:17:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:42,277 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-05-03 16:17:42,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-05-03 16:17:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:42,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:42,278 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:42,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-05-03 16:17:42,497 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-05-03 16:17:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:42,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132190285] [2021-05-03 16:17:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:17:42,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132190285] [2021-05-03 16:17:42,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435911926] [2021-05-03 16:17:42,744 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) [2021-05-03 16:17:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:17:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:43,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:43,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991810552] [2021-05-03 16:17:43,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:43,327 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:44,229 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 16:17:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:44,781 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-05-03 16:17:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:17:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:44,793 INFO L225 Difference]: With dead ends: 627 [2021-05-03 16:17:44,793 INFO L226 Difference]: Without dead ends: 585 [2021-05-03 16:17:44,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1521.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:17:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-03 16:17:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-05-03 16:17:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-05-03 16:17:44,799 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-05-03 16:17:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:44,799 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-05-03 16:17:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-05-03 16:17:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:44,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:44,799 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:45,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:45,000 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-05-03 16:17:45,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:45,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451119347] [2021-05-03 16:17:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:45,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451119347] [2021-05-03 16:17:45,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114116627] [2021-05-03 16:17:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:45,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:17:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:45,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:45,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 16:17:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808174690] [2021-05-03 16:17:45,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:45,829 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:46,719 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-05-03 16:17:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:17:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:46,721 INFO L225 Difference]: With dead ends: 564 [2021-05-03 16:17:46,721 INFO L226 Difference]: Without dead ends: 550 [2021-05-03 16:17:46,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1135.5ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:17:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-03 16:17:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-05-03 16:17:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-05-03 16:17:46,730 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-05-03 16:17:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:46,730 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-05-03 16:17:46,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-05-03 16:17:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:46,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:46,731 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:46,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 16:17:46,954 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-05-03 16:17:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:46,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729051296] [2021-05-03 16:17:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:47,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729051296] [2021-05-03 16:17:47,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803437005] [2021-05-03 16:17:47,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:47,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:17:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:47,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:47,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:47,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077190514] [2021-05-03 16:17:47,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:47,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:47,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:47,645 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:49,694 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-05-03 16:17:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:17:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:49,696 INFO L225 Difference]: With dead ends: 680 [2021-05-03 16:17:49,697 INFO L226 Difference]: Without dead ends: 660 [2021-05-03 16:17:49,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1836.6ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:17:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-03 16:17:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-05-03 16:17:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-05-03 16:17:49,706 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-05-03 16:17:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:49,706 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-05-03 16:17:49,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-05-03 16:17:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:49,707 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:49,707 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:49,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-03 16:17:49,913 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-05-03 16:17:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:49,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713104885] [2021-05-03 16:17:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713104885] [2021-05-03 16:17:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894348598] [2021-05-03 16:17:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:17:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:50,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:50,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:17:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753683332] [2021-05-03 16:17:50,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:17:50,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:17:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:17:50,647 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:52,415 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-05-03 16:17:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 16:17:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:52,419 INFO L225 Difference]: With dead ends: 716 [2021-05-03 16:17:52,419 INFO L226 Difference]: Without dead ends: 680 [2021-05-03 16:17:52,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1625.7ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:17:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-03 16:17:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-05-03 16:17:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-05-03 16:17:52,428 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-05-03 16:17:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:52,429 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-05-03 16:17:52,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-05-03 16:17:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:52,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:52,430 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:52,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-05-03 16:17:52,645 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-05-03 16:17:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:52,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137107092] [2021-05-03 16:17:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:52,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137107092] [2021-05-03 16:17:52,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468446176] [2021-05-03 16:17:52,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:52,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:17:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:53,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:53,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 16:17:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362213126] [2021-05-03 16:17:53,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:17:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:17:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:17:53,408 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:54,364 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-05-03 16:17:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:17:54,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:54,366 INFO L225 Difference]: With dead ends: 658 [2021-05-03 16:17:54,367 INFO L226 Difference]: Without dead ends: 644 [2021-05-03 16:17:54,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:17:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-05-03 16:17:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-05-03 16:17:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-05-03 16:17:54,376 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-05-03 16:17:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:54,376 INFO L480 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-05-03 16:17:54,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-05-03 16:17:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:54,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:54,377 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:54,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-05-03 16:17:54,603 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-05-03 16:17:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:54,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457378221] [2021-05-03 16:17:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:54,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457378221] [2021-05-03 16:17:54,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833796717] [2021-05-03 16:17:54,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:54,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:17:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:17:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:55,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:55,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 16:17:55,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633344310] [2021-05-03 16:17:55,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:55,342 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:57,163 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-05-03 16:17:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:17:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:57,166 INFO L225 Difference]: With dead ends: 751 [2021-05-03 16:17:57,166 INFO L226 Difference]: Without dead ends: 731 [2021-05-03 16:17:57,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1672.7ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:17:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-05-03 16:17:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-05-03 16:17:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-05-03 16:17:57,174 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-05-03 16:17:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:57,174 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-05-03 16:17:57,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-05-03 16:17:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:57,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:57,176 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:57,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-03 16:17:57,401 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-05-03 16:17:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544353376] [2021-05-03 16:17:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544353376] [2021-05-03 16:17:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807370600] [2021-05-03 16:17:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:57,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:17:57,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:17:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:58,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:17:58,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:17:58,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900504281] [2021-05-03 16:17:58,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:17:58,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:17:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:17:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:17:58,179 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:17:58,989 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-05-03 16:17:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:17:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:17:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:17:58,993 INFO L225 Difference]: With dead ends: 681 [2021-05-03 16:17:58,993 INFO L226 Difference]: Without dead ends: 667 [2021-05-03 16:17:58,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:17:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-05-03 16:17:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-05-03 16:17:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-05-03 16:17:59,002 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-05-03 16:17:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:17:59,003 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-05-03 16:17:59,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:17:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-05-03 16:17:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:17:59,004 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:17:59,004 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:17:59,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:59,211 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:17:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:17:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-05-03 16:17:59,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:17:59,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195957840] [2021-05-03 16:17:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:17:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:17:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:17:59,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195957840] [2021-05-03 16:17:59,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584656989] [2021-05-03 16:17:59,500 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:17:59,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:17:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:17:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:17:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:00,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:00,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-05-03 16:18:00,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971009714] [2021-05-03 16:18:00,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:18:00,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:18:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:18:00,135 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:01,751 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-05-03 16:18:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:18:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:18:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:01,755 INFO L225 Difference]: With dead ends: 783 [2021-05-03 16:18:01,755 INFO L226 Difference]: Without dead ends: 769 [2021-05-03 16:18:01,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1777.9ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:18:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-05-03 16:18:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-05-03 16:18:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-05-03 16:18:01,765 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-05-03 16:18:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:01,765 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-05-03 16:18:01,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-05-03 16:18:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:18:01,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:01,766 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:01,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 16:18:01,993 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-05-03 16:18:01,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:01,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019055125] [2021-05-03 16:18:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:02,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019055125] [2021-05-03 16:18:02,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387964017] [2021-05-03 16:18:02,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:02,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:18:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:18:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:02,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:02,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 16:18:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084785986] [2021-05-03 16:18:02,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:18:02,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:18:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:18:02,706 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:05,207 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-05-03 16:18:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 16:18:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:18:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:05,211 INFO L225 Difference]: With dead ends: 813 [2021-05-03 16:18:05,211 INFO L226 Difference]: Without dead ends: 777 [2021-05-03 16:18:05,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 2139.7ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 16:18:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-05-03 16:18:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-05-03 16:18:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-05-03 16:18:05,221 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-05-03 16:18:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:05,221 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-05-03 16:18:05,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-05-03 16:18:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:18:05,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:05,222 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:05,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:05,423 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-05-03 16:18:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:05,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110508257] [2021-05-03 16:18:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:05,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110508257] [2021-05-03 16:18:05,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202643157] [2021-05-03 16:18:05,737 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 [2021-05-03 16:18:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:18:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:06,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:06,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 16:18:06,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970796196] [2021-05-03 16:18:06,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:18:06,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:06,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:18:06,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:18:06,297 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:07,435 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-05-03 16:18:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:18:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:18:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:07,444 INFO L225 Difference]: With dead ends: 765 [2021-05-03 16:18:07,444 INFO L226 Difference]: Without dead ends: 739 [2021-05-03 16:18:07,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:18:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-05-03 16:18:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-05-03 16:18:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-05-03 16:18:07,452 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-05-03 16:18:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:07,453 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-05-03 16:18:07,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-05-03 16:18:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:18:07,454 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:07,454 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:07,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-03 16:18:07,668 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-05-03 16:18:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220510522] [2021-05-03 16:18:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220510522] [2021-05-03 16:18:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590762932] [2021-05-03 16:18:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:07,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:18:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:18:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:08,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:08,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 16:18:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086443834] [2021-05-03 16:18:08,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:18:08,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:18:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:18:08,428 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:09,875 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-05-03 16:18:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:18:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 16:18:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:09,878 INFO L225 Difference]: With dead ends: 878 [2021-05-03 16:18:09,878 INFO L226 Difference]: Without dead ends: 842 [2021-05-03 16:18:09,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1429.3ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:18:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-05-03 16:18:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-05-03 16:18:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-05-03 16:18:09,888 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-05-03 16:18:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:09,888 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-05-03 16:18:09,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-05-03 16:18:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:09,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:09,889 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:10,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:10,090 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-05-03 16:18:10,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:10,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691481023] [2021-05-03 16:18:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:18:10,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691481023] [2021-05-03 16:18:10,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361156210] [2021-05-03 16:18:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:10,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:18:10,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:10,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:18:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:11,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:11,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-03 16:18:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998883007] [2021-05-03 16:18:11,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:18:11,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:18:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:18:11,088 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:12,220 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-05-03 16:18:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:18:12,222 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:12,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:12,223 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:18:12,223 INFO L226 Difference]: Without dead ends: 545 [2021-05-03 16:18:12,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1424.7ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:18:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-03 16:18:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-05-03 16:18:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-05-03 16:18:12,230 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-05-03 16:18:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:12,230 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-05-03 16:18:12,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-05-03 16:18:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:12,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:12,231 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:12,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-05-03 16:18:12,445 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-05-03 16:18:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:12,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548638844] [2021-05-03 16:18:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:12,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548638844] [2021-05-03 16:18:12,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817815176] [2021-05-03 16:18:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:18:12,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:18:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:12,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:18:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:13,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-03 16:18:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389886757] [2021-05-03 16:18:13,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:18:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:18:13,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:18:13,384 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:14,814 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-05-03 16:18:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:18:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:14,817 INFO L225 Difference]: With dead ends: 591 [2021-05-03 16:18:14,817 INFO L226 Difference]: Without dead ends: 567 [2021-05-03 16:18:14,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:18:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-03 16:18:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-05-03 16:18:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-05-03 16:18:14,825 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-05-03 16:18:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-05-03 16:18:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-05-03 16:18:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:14,826 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:14,826 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:15,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-03 16:18:15,027 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-05-03 16:18:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:15,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529379771] [2021-05-03 16:18:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:18:15,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529379771] [2021-05-03 16:18:15,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130154811] [2021-05-03 16:18:15,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:15,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:18:15,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:15,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:18:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:15,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:15,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-03 16:18:15,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492447258] [2021-05-03 16:18:15,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:18:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:15,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:18:15,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:18:15,935 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:18,126 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-05-03 16:18:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:18:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:18,129 INFO L225 Difference]: With dead ends: 627 [2021-05-03 16:18:18,130 INFO L226 Difference]: Without dead ends: 601 [2021-05-03 16:18:18,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2001.5ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 16:18:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-03 16:18:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-05-03 16:18:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-05-03 16:18:18,138 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-05-03 16:18:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:18,139 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-05-03 16:18:18,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-05-03 16:18:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:18,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:18,140 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:18,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-03 16:18:18,340 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-05-03 16:18:18,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:18,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421586064] [2021-05-03 16:18:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:18:18,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421586064] [2021-05-03 16:18:18,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850830785] [2021-05-03 16:18:18,685 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) [2021-05-03 16:18:18,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:18:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:18,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:19,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:19,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:19,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834584482] [2021-05-03 16:18:19,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:19,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:19,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:19,536 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:20,902 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-05-03 16:18:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 16:18:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:20,906 INFO L225 Difference]: With dead ends: 685 [2021-05-03 16:18:20,906 INFO L226 Difference]: Without dead ends: 631 [2021-05-03 16:18:20,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1769.3ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:18:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-05-03 16:18:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-05-03 16:18:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-05-03 16:18:20,920 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-05-03 16:18:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:20,920 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-05-03 16:18:20,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-05-03 16:18:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:20,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:20,921 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:21,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:21,141 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-05-03 16:18:21,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:21,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864456140] [2021-05-03 16:18:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:18:21,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864456140] [2021-05-03 16:18:21,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756297439] [2021-05-03 16:18:21,418 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 [2021-05-03 16:18:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:21,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:22,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:22,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661900033] [2021-05-03 16:18:22,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:22,040 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:23,893 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-05-03 16:18:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:18:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:23,896 INFO L225 Difference]: With dead ends: 696 [2021-05-03 16:18:23,896 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 16:18:23,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1954.9ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:18:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 16:18:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-05-03 16:18:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-05-03 16:18:23,906 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-05-03 16:18:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:23,906 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-05-03 16:18:23,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-05-03 16:18:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:23,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:23,907 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:24,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:24,108 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-05-03 16:18:24,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:24,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052284110] [2021-05-03 16:18:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:18:24,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052284110] [2021-05-03 16:18:24,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082295302] [2021-05-03 16:18:24,457 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 [2021-05-03 16:18:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:18:24,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:24,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:24,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:25,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:25,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056814779] [2021-05-03 16:18:25,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:25,091 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:27,258 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-05-03 16:18:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 16:18:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:27,261 INFO L225 Difference]: With dead ends: 739 [2021-05-03 16:18:27,261 INFO L226 Difference]: Without dead ends: 713 [2021-05-03 16:18:27,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2188.8ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:18:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-05-03 16:18:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-05-03 16:18:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-05-03 16:18:27,281 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-05-03 16:18:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:27,281 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-05-03 16:18:27,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-05-03 16:18:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:27,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:27,282 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:27,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:27,482 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-05-03 16:18:27,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:27,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866621251] [2021-05-03 16:18:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:27,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866621251] [2021-05-03 16:18:27,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400399034] [2021-05-03 16:18:27,765 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 [2021-05-03 16:18:27,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:18:27,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:18:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:28,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:28,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-05-03 16:18:28,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123196425] [2021-05-03 16:18:28,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:18:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:18:28,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:18:28,442 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:30,129 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-05-03 16:18:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:18:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:30,131 INFO L225 Difference]: With dead ends: 724 [2021-05-03 16:18:30,131 INFO L226 Difference]: Without dead ends: 647 [2021-05-03 16:18:30,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1644.4ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:18:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-05-03 16:18:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-05-03 16:18:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-05-03 16:18:30,139 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-05-03 16:18:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:30,139 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-05-03 16:18:30,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-05-03 16:18:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:30,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:30,140 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:30,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:30,341 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-05-03 16:18:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:30,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190872361] [2021-05-03 16:18:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:18:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190872361] [2021-05-03 16:18:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006482231] [2021-05-03 16:18:30,629 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 [2021-05-03 16:18:30,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:18:30,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:30,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:18:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:31,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:31,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:31,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380777909] [2021-05-03 16:18:31,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:31,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:31,243 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:32,726 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-05-03 16:18:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:18:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:32,728 INFO L225 Difference]: With dead ends: 754 [2021-05-03 16:18:32,728 INFO L226 Difference]: Without dead ends: 702 [2021-05-03 16:18:32,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1603.1ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:18:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-03 16:18:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-05-03 16:18:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-05-03 16:18:32,740 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-05-03 16:18:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:32,740 INFO L480 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-05-03 16:18:32,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-05-03 16:18:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:32,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:32,742 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:32,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-05-03 16:18:32,953 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-05-03 16:18:32,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:32,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065218060] [2021-05-03 16:18:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:33,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065218060] [2021-05-03 16:18:33,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624271186] [2021-05-03 16:18:33,233 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 [2021-05-03 16:18:33,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:18:33,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:33,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:18:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:33,641 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:18:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:34,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:34,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 16:18:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293411534] [2021-05-03 16:18:34,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:18:34,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:18:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:18:34,362 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:37,384 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-05-03 16:18:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:18:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:37,387 INFO L225 Difference]: With dead ends: 840 [2021-05-03 16:18:37,387 INFO L226 Difference]: Without dead ends: 818 [2021-05-03 16:18:37,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 3332.9ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 16:18:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-05-03 16:18:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-05-03 16:18:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-05-03 16:18:37,395 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-05-03 16:18:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:37,395 INFO L480 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-05-03 16:18:37,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-05-03 16:18:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:37,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:37,397 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:37,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:37,605 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-05-03 16:18:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595133529] [2021-05-03 16:18:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:18:37,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595133529] [2021-05-03 16:18:37,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707330589] [2021-05-03 16:18:37,939 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) [2021-05-03 16:18:37,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:18:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:37,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:38,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:38,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:38,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772975728] [2021-05-03 16:18:38,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:38,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:38,574 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:41,712 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-05-03 16:18:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:18:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:41,715 INFO L225 Difference]: With dead ends: 877 [2021-05-03 16:18:41,715 INFO L226 Difference]: Without dead ends: 847 [2021-05-03 16:18:41,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2995.6ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 16:18:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-05-03 16:18:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-05-03 16:18:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-05-03 16:18:41,724 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-05-03 16:18:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:41,724 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-05-03 16:18:41,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-05-03 16:18:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:41,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:41,725 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:41,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-05-03 16:18:41,926 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-05-03 16:18:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:41,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961211220] [2021-05-03 16:18:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:42,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961211220] [2021-05-03 16:18:42,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556603252] [2021-05-03 16:18:42,243 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 [2021-05-03 16:18:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:18:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:43,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:43,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:18:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065854095] [2021-05-03 16:18:43,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:18:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:18:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:18:43,068 INFO L87 Difference]: Start difference. First operand 593 states and 1282 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:44,600 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-05-03 16:18:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:18:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:44,603 INFO L225 Difference]: With dead ends: 753 [2021-05-03 16:18:44,603 INFO L226 Difference]: Without dead ends: 731 [2021-05-03 16:18:44,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1797.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:18:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-05-03 16:18:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-05-03 16:18:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-05-03 16:18:44,615 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-05-03 16:18:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:44,615 INFO L480 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-05-03 16:18:44,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-05-03 16:18:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:44,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:44,617 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:44,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-03 16:18:44,833 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-05-03 16:18:44,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:44,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990635317] [2021-05-03 16:18:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990635317] [2021-05-03 16:18:45,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728298509] [2021-05-03 16:18:45,272 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 [2021-05-03 16:18:45,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:18:45,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:45,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:18:45,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:46,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:46,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:18:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445818968] [2021-05-03 16:18:46,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:18:46,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:18:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:18:46,229 INFO L87 Difference]: Start difference. First operand 618 states and 1334 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:47,624 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-05-03 16:18:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:18:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:47,627 INFO L225 Difference]: With dead ends: 872 [2021-05-03 16:18:47,627 INFO L226 Difference]: Without dead ends: 839 [2021-05-03 16:18:47,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1953.4ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:18:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-05-03 16:18:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-05-03 16:18:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-05-03 16:18:47,639 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-05-03 16:18:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:47,639 INFO L480 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-05-03 16:18:47,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-05-03 16:18:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:47,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:47,641 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:47,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:47,868 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-05-03 16:18:47,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:47,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479000469] [2021-05-03 16:18:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:48,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479000469] [2021-05-03 16:18:48,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436643263] [2021-05-03 16:18:48,327 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 [2021-05-03 16:18:48,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:18:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:48,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:18:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:49,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:49,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:18:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362952459] [2021-05-03 16:18:49,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:18:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:18:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:18:49,361 INFO L87 Difference]: Start difference. First operand 617 states and 1332 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:50,961 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-05-03 16:18:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:18:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:50,963 INFO L225 Difference]: With dead ends: 1003 [2021-05-03 16:18:50,963 INFO L226 Difference]: Without dead ends: 970 [2021-05-03 16:18:50,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2111.4ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:18:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-05-03 16:18:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-05-03 16:18:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-05-03 16:18:50,972 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-05-03 16:18:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:50,972 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-05-03 16:18:50,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-05-03 16:18:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:50,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:50,973 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:51,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:51,173 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-05-03 16:18:51,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:51,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531000094] [2021-05-03 16:18:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:18:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531000094] [2021-05-03 16:18:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161051396] [2021-05-03 16:18:51,511 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 [2021-05-03 16:18:51,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:18:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:51,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:52,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:52,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:52,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542674400] [2021-05-03 16:18:52,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:52,369 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:53,736 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-05-03 16:18:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:18:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:53,738 INFO L225 Difference]: With dead ends: 675 [2021-05-03 16:18:53,738 INFO L226 Difference]: Without dead ends: 607 [2021-05-03 16:18:53,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1843.1ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:18:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-05-03 16:18:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-05-03 16:18:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-05-03 16:18:53,745 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-05-03 16:18:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:53,746 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-05-03 16:18:53,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-05-03 16:18:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:53,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:53,746 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:53,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:53,947 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-05-03 16:18:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:53,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122011781] [2021-05-03 16:18:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:18:54,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122011781] [2021-05-03 16:18:54,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969567251] [2021-05-03 16:18:54,339 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) [2021-05-03 16:18:54,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:18:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:54,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:18:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:55,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:55,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:55,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963841210] [2021-05-03 16:18:55,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:55,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:55,351 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:18:57,406 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-05-03 16:18:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:18:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:18:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:18:57,408 INFO L225 Difference]: With dead ends: 703 [2021-05-03 16:18:57,408 INFO L226 Difference]: Without dead ends: 679 [2021-05-03 16:18:57,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 2572.6ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:18:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-05-03 16:18:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-05-03 16:18:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-05-03 16:18:57,415 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-05-03 16:18:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:18:57,415 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-05-03 16:18:57,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:18:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-05-03 16:18:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:18:57,416 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:18:57,416 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:18:57,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-05-03 16:18:57,637 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:18:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:18:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-05-03 16:18:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:18:57,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621357410] [2021-05-03 16:18:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:18:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:18:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:18:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621357410] [2021-05-03 16:18:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926621809] [2021-05-03 16:18:58,090 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 [2021-05-03 16:18:58,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:18:58,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:18:58,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:18:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:18:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:18:59,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:18:59,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-03 16:18:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386303015] [2021-05-03 16:18:59,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:18:59,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:18:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:18:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:18:59,052 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:19:02,090 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-05-03 16:19:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:19:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:19:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:19:02,093 INFO L225 Difference]: With dead ends: 756 [2021-05-03 16:19:02,093 INFO L226 Difference]: Without dead ends: 730 [2021-05-03 16:19:02,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 3176.0ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:19:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-05-03 16:19:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-05-03 16:19:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-05-03 16:19:02,103 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-05-03 16:19:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:19:02,103 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-05-03 16:19:02,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-05-03 16:19:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:19:02,104 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:19:02,104 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:19:02,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-03 16:19:02,318 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:19:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:19:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-05-03 16:19:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:19:02,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518008294] [2021-05-03 16:19:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:19:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:19:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:19:02,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518008294] [2021-05-03 16:19:02,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313789157] [2021-05-03 16:19:02,720 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 [2021-05-03 16:19:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:19:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:19:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:19:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:19:03,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:19:03,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:19:03,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327109045] [2021-05-03 16:19:03,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:19:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:19:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:19:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:19:03,553 INFO L87 Difference]: Start difference. First operand 457 states and 910 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:19:05,159 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-05-03 16:19:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:19:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:19:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:19:05,163 INFO L225 Difference]: With dead ends: 708 [2021-05-03 16:19:05,163 INFO L226 Difference]: Without dead ends: 683 [2021-05-03 16:19:05,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1960.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:19:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-05-03 16:19:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-05-03 16:19:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-05-03 16:19:05,172 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-05-03 16:19:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:19:05,172 INFO L480 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-05-03 16:19:05,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-05-03 16:19:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:19:05,173 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:19:05,173 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:19:05,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-05-03 16:19:05,391 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:19:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:19:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-05-03 16:19:05,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:19:05,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037832829] [2021-05-03 16:19:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:19:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:19:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:19:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037832829] [2021-05-03 16:19:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821785962] [2021-05-03 16:19:05,895 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 [2021-05-03 16:19:05,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:19:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:19:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:19:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:19:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:19:06,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:19:06,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-03 16:19:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440705482] [2021-05-03 16:19:06,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:19:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:19:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:19:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:19:06,756 INFO L87 Difference]: Start difference. First operand 517 states and 1030 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:19:08,905 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-05-03 16:19:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:19:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:19:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:19:08,909 INFO L225 Difference]: With dead ends: 722 [2021-05-03 16:19:08,909 INFO L226 Difference]: Without dead ends: 693 [2021-05-03 16:19:08,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2512.6ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:19:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-05-03 16:19:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-05-03 16:19:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-05-03 16:19:08,917 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-05-03 16:19:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:19:08,918 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-05-03 16:19:08,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-05-03 16:19:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:19:08,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:19:08,918 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:19:09,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:19:09,125 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:19:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:19:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-05-03 16:19:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:19:09,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954407375] [2021-05-03 16:19:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:19:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:19:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:19:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954407375] [2021-05-03 16:19:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408235045] [2021-05-03 16:19:09,574 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 [2021-05-03 16:19:09,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:19:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:19:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:19:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:19:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:19:10,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:19:10,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-05-03 16:19:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383143951] [2021-05-03 16:19:10,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:19:10,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:19:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:19:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:19:10,469 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:19:12,649 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-05-03 16:19:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:19:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:19:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:19:12,651 INFO L225 Difference]: With dead ends: 368 [2021-05-03 16:19:12,651 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 16:19:12,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2484.4ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:19:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 16:19:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 16:19:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 16:19:12,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-05-03 16:19:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:19:12,652 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 16:19:12,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:19:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 16:19:12,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 16:19:12,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-05-03 16:19:12,861 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:19:12 BasicIcfg [2021-05-03 16:19:12,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:19:12,862 INFO L168 Benchmark]: Toolchain (without parser) took 160581.84 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 363.5 MB in the beginning and 375.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.0 GB. [2021-05-03 16:19:12,862 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.34 ms. Allocated memory is still 383.8 MB. Free memory was 364.6 MB in the beginning and 364.5 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:19:12,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 383.8 MB. Free memory was 363.4 MB in the beginning and 362.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:19:12,862 INFO L168 Benchmark]: Boogie Preprocessor took 16.76 ms. Allocated memory is still 383.8 MB. Free memory was 362.0 MB in the beginning and 361.0 MB in the end (delta: 962.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:19:12,862 INFO L168 Benchmark]: RCFGBuilder took 362.94 ms. Allocated memory is still 383.8 MB. Free memory was 360.9 MB in the beginning and 349.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 16:19:12,863 INFO L168 Benchmark]: TraceAbstraction took 160164.83 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 348.8 MB in the beginning and 375.3 MB in the end (delta: -26.5 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.0 GB. [2021-05-03 16:19:12,863 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 0.34 ms. Allocated memory is still 383.8 MB. Free memory was 364.6 MB in the beginning and 364.5 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 383.8 MB. Free memory was 363.4 MB in the beginning and 362.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.76 ms. Allocated memory is still 383.8 MB. Free memory was 362.0 MB in the beginning and 361.0 MB in the end (delta: 962.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 362.94 ms. Allocated memory is still 383.8 MB. Free memory was 360.9 MB in the beginning and 349.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 160164.83 ms. Allocated memory was 383.8 MB in the beginning and 461.4 MB in the end (delta: 77.6 MB). Free memory was 348.8 MB in the beginning and 375.3 MB in the end (delta: -26.5 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 160064.6ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 62.2ms, AutomataDifference: 90740.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8575 SDslu, 14141 SDs, 0 SdLazy, 47169 SolverSat, 4093 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22998.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 97667.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 518.3ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 215.2ms SsaConstructionTime, 655.2ms SatisfiabilityAnalysisTime, 53265.3ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...