/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-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:32:48,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:32:48,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:32:48,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:32:48,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:32:48,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:32:48,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:32:48,851 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:32:48,851 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:32:48,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:32:48,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:32:48,854 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:32:48,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:32:48,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:32:48,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:32:48,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:32:48,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:32:48,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:32:48,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:32:48,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:32:48,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:32:48,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:32:48,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:32:48,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:32:48,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:32:49,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:32:49,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:32:49,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:32:49,221 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:32:49,223 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:32:49,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-03-11 00:32:49,224 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-03-11 00:32:49,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:32:49,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:32:49,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:32:49,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:32:49,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:32:49,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:32:49,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:32:49,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:32:49,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:32:49,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... [2021-03-11 00:32:49,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:32:49,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:32:49,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:32:49,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:32:49,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:32:49,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:32:49,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:32:49,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:32:49,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:32:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:32:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:32:49,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:32:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:32:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:32:49,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:32:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:32:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:32:49,376 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-11 00:32:49,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-11 00:32:49,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-11 00:32:49,377 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:32:49,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:32:49,640 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:32:49,642 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:32:49 BoogieIcfgContainer [2021-03-11 00:32:49,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:32:49,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:32:49,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:32:49,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:32:49,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:32:49" (1/2) ... [2021-03-11 00:32:49,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526830d9 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:32:49, skipping insertion in model container [2021-03-11 00:32:49,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:32:49" (2/2) ... [2021-03-11 00:32:49,649 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-03-11 00:32:49,653 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:32:49,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:32:49,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:32:49,657 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:32:49,695 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-11 00:32:49,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 00:32:49,726 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:32:49,726 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:32:49,727 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:32:49,727 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:32:49,727 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:32:49,727 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:32:49,727 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:32:49,727 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:32:49,736 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-03-11 00:32:49,787 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:32:49,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:49,808 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:49,808 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -346285064, now seen corresponding path program 1 times [2021-03-11 00:32:49,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:49,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264673847] [2021-03-11 00:32:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:49,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264673847] [2021-03-11 00:32:49,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:49,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:32:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440999312] [2021-03-11 00:32:49,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:32:49,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:49,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:32:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:32:49,974 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:50,055 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-03-11 00:32:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:32:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-11 00:32:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:50,091 INFO L225 Difference]: With dead ends: 856 [2021-03-11 00:32:50,091 INFO L226 Difference]: Without dead ends: 731 [2021-03-11 00:32:50,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:32:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-03-11 00:32:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-03-11 00:32:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-03-11 00:32:50,214 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-03-11 00:32:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:50,217 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-03-11 00:32:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-03-11 00:32:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:50,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:50,231 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:50,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:32:50,232 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1325518410, now seen corresponding path program 1 times [2021-03-11 00:32:50,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:50,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334175357] [2021-03-11 00:32:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:50,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334175357] [2021-03-11 00:32:50,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523262684] [2021-03-11 00:32:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:32:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:50,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:50,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-03-11 00:32:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370003203] [2021-03-11 00:32:50,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:32:50,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:32:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:32:50,642 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:50,730 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-03-11 00:32:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:50,745 INFO L225 Difference]: With dead ends: 1527 [2021-03-11 00:32:50,745 INFO L226 Difference]: Without dead ends: 1527 [2021-03-11 00:32:50,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:32:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-03-11 00:32:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-03-11 00:32:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-03-11 00:32:50,792 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-03-11 00:32:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:50,793 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-03-11 00:32:50,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-03-11 00:32:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:50,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:50,797 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:51,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-11 00:32:51,011 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -622773130, now seen corresponding path program 1 times [2021-03-11 00:32:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885412395] [2021-03-11 00:32:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885412395] [2021-03-11 00:32:51,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:51,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:32:51,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075945595] [2021-03-11 00:32:51,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:32:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:32:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,114 INFO L87 Difference]: Start difference. First operand 837 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,189 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-03-11 00:32:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,198 INFO L225 Difference]: With dead ends: 1186 [2021-03-11 00:32:51,198 INFO L226 Difference]: Without dead ends: 1076 [2021-03-11 00:32:51,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:32:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-03-11 00:32:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-03-11 00:32:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-03-11 00:32:51,236 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-03-11 00:32:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:51,236 INFO L480 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-03-11 00:32:51,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-03-11 00:32:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:51,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:51,242 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:51,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:32:51,242 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1350746626, now seen corresponding path program 2 times [2021-03-11 00:32:51,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018197923] [2021-03-11 00:32:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:51,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018197923] [2021-03-11 00:32:51,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:51,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:32:51,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158220865] [2021-03-11 00:32:51,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:32:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:32:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:32:51,312 INFO L87 Difference]: Start difference. First operand 805 states and 3054 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,396 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-03-11 00:32:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:32:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,404 INFO L225 Difference]: With dead ends: 1022 [2021-03-11 00:32:51,404 INFO L226 Difference]: Without dead ends: 1022 [2021-03-11 00:32:51,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-03-11 00:32:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-03-11 00:32:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-03-11 00:32:51,437 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-03-11 00:32:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:51,437 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-03-11 00:32:51,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-03-11 00:32:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:51,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:51,441 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:51,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 00:32:51,442 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash 84290046, now seen corresponding path program 2 times [2021-03-11 00:32:51,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520541287] [2021-03-11 00:32:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:51,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520541287] [2021-03-11 00:32:51,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:51,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:32:51,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646283519] [2021-03-11 00:32:51,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:32:51,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:32:51,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,500 INFO L87 Difference]: Start difference. First operand 847 states and 3174 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,570 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-03-11 00:32:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,579 INFO L225 Difference]: With dead ends: 1324 [2021-03-11 00:32:51,580 INFO L226 Difference]: Without dead ends: 1288 [2021-03-11 00:32:51,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:32:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-03-11 00:32:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-03-11 00:32:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-03-11 00:32:51,616 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-03-11 00:32:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:51,616 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-03-11 00:32:51,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-03-11 00:32:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:51,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:51,620 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:51,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 00:32:51,620 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 227514278, now seen corresponding path program 3 times [2021-03-11 00:32:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176378450] [2021-03-11 00:32:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:51,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176378450] [2021-03-11 00:32:51,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:51,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:32:51,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335696262] [2021-03-11 00:32:51,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:32:51,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:51,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:32:51,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:32:51,672 INFO L87 Difference]: Start difference. First operand 893 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,715 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-03-11 00:32:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:32:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,726 INFO L225 Difference]: With dead ends: 1414 [2021-03-11 00:32:51,726 INFO L226 Difference]: Without dead ends: 1392 [2021-03-11 00:32:51,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-03-11 00:32:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-03-11 00:32:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-03-11 00:32:51,780 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-03-11 00:32:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:51,783 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-03-11 00:32:51,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-03-11 00:32:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:32:51,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:51,789 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:51,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 00:32:51,794 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash -162447450, now seen corresponding path program 4 times [2021-03-11 00:32:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771870877] [2021-03-11 00:32:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:51,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771870877] [2021-03-11 00:32:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:32:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030930213] [2021-03-11 00:32:51,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:32:51,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:51,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:32:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,880 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,921 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-03-11 00:32:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:32:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-11 00:32:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,933 INFO L225 Difference]: With dead ends: 1451 [2021-03-11 00:32:51,933 INFO L226 Difference]: Without dead ends: 1451 [2021-03-11 00:32:51,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-03-11 00:32:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-03-11 00:32:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-03-11 00:32:52,008 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-03-11 00:32:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:52,008 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-03-11 00:32:52,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-03-11 00:32:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:32:52,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:52,014 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:52,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 00:32:52,015 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 770281974, now seen corresponding path program 1 times [2021-03-11 00:32:52,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:52,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505790041] [2021-03-11 00:32:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505790041] [2021-03-11 00:32:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800278025] [2021-03-11 00:32:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:32:52,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:52,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:52,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-03-11 00:32:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556748964] [2021-03-11 00:32:52,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:32:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:32:52,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:32:52,318 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:52,420 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-03-11 00:32:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:32:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:52,433 INFO L225 Difference]: With dead ends: 1625 [2021-03-11 00:32:52,433 INFO L226 Difference]: Without dead ends: 1546 [2021-03-11 00:32:52,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:32:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-03-11 00:32:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-03-11 00:32:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-03-11 00:32:52,480 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-03-11 00:32:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:52,480 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-03-11 00:32:52,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-03-11 00:32:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:32:52,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:52,487 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:52,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:52,703 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1325590424, now seen corresponding path program 2 times [2021-03-11 00:32:52,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:52,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732650718] [2021-03-11 00:32:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:52,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732650718] [2021-03-11 00:32:52,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:52,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:32:52,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583064277] [2021-03-11 00:32:52,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:32:52,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:32:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:32:52,754 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:52,781 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-03-11 00:32:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:32:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:32:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:52,791 INFO L225 Difference]: With dead ends: 1338 [2021-03-11 00:32:52,791 INFO L226 Difference]: Without dead ends: 1338 [2021-03-11 00:32:52,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:32:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-03-11 00:32:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-03-11 00:32:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-03-11 00:32:52,831 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-03-11 00:32:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:52,831 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-03-11 00:32:52,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-03-11 00:32:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:32:52,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:52,836 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:52,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 00:32:52,836 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1169689052, now seen corresponding path program 1 times [2021-03-11 00:32:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:52,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261649401] [2021-03-11 00:32:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261649401] [2021-03-11 00:32:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693299445] [2021-03-11 00:32:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:32:52,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:53,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:53,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-03-11 00:32:53,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636630884] [2021-03-11 00:32:53,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:32:53,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:32:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:32:53,028 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:53,093 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-03-11 00:32:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:32:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:53,115 INFO L225 Difference]: With dead ends: 1711 [2021-03-11 00:32:53,115 INFO L226 Difference]: Without dead ends: 1659 [2021-03-11 00:32:53,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:32:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-03-11 00:32:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-03-11 00:32:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-03-11 00:32:53,183 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-03-11 00:32:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:53,183 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-03-11 00:32:53,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-03-11 00:32:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:32:53,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:53,189 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:53,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-11 00:32:53,408 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1094939800, now seen corresponding path program 3 times [2021-03-11 00:32:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:53,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749548677] [2021-03-11 00:32:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:53,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749548677] [2021-03-11 00:32:53,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:32:53,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:32:53,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750214865] [2021-03-11 00:32:53,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:32:53,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:32:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:32:53,466 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:53,503 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-03-11 00:32:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:32:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:32:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:53,515 INFO L225 Difference]: With dead ends: 1111 [2021-03-11 00:32:53,515 INFO L226 Difference]: Without dead ends: 946 [2021-03-11 00:32:53,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-11 00:32:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-03-11 00:32:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-03-11 00:32:53,546 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-03-11 00:32:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:53,546 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-03-11 00:32:53,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-03-11 00:32:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:32:53,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:53,550 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:53,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 00:32:53,550 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:53,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1165509964, now seen corresponding path program 1 times [2021-03-11 00:32:53,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:53,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234325235] [2021-03-11 00:32:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:53,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234325235] [2021-03-11 00:32:53,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905535394] [2021-03-11 00:32:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:32:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:53,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:53,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-03-11 00:32:53,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611719934] [2021-03-11 00:32:53,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:32:53,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:32:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:32:53,704 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:53,790 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-03-11 00:32:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-11 00:32:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:53,811 INFO L225 Difference]: With dead ends: 2765 [2021-03-11 00:32:53,812 INFO L226 Difference]: Without dead ends: 2631 [2021-03-11 00:32:53,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:32:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-03-11 00:32:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-03-11 00:32:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-03-11 00:32:53,897 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-03-11 00:32:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:53,898 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-03-11 00:32:53,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-03-11 00:32:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:32:53,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:53,907 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:54,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:54,126 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1684408818, now seen corresponding path program 2 times [2021-03-11 00:32:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:54,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128418968] [2021-03-11 00:32:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:32:54,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128418968] [2021-03-11 00:32:54,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781237988] [2021-03-11 00:32:54,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:54,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:32:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-11 00:32:54,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:54,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-03-11 00:32:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486673528] [2021-03-11 00:32:54,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:32:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:32:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:32:54,320 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-03-11 00:32:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:54,436 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-03-11 00:32:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:32:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:54,454 INFO L225 Difference]: With dead ends: 2660 [2021-03-11 00:32:54,454 INFO L226 Difference]: Without dead ends: 2660 [2021-03-11 00:32:54,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:32:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-03-11 00:32:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-03-11 00:32:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-03-11 00:32:54,554 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-03-11 00:32:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:54,554 INFO L480 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-03-11 00:32:54,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-03-11 00:32:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-03-11 00:32:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:32:54,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:54,564 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:54,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:32:54,779 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1964960968, now seen corresponding path program 1 times [2021-03-11 00:32:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:54,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132189771] [2021-03-11 00:32:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:32:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132189771] [2021-03-11 00:32:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900613555] [2021-03-11 00:32:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:32:54,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:54,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:54,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-11 00:32:54,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269095020] [2021-03-11 00:32:54,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:32:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:32:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:32:54,974 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:55,050 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-03-11 00:32:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:32:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:32:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:55,063 INFO L225 Difference]: With dead ends: 2794 [2021-03-11 00:32:55,063 INFO L226 Difference]: Without dead ends: 2640 [2021-03-11 00:32:55,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:32:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-03-11 00:32:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-03-11 00:32:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-03-11 00:32:55,147 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-03-11 00:32:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:55,148 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-03-11 00:32:55,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-03-11 00:32:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:32:55,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:55,156 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:55,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:55,372 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash 659344036, now seen corresponding path program 2 times [2021-03-11 00:32:55,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:55,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702837838] [2021-03-11 00:32:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702837838] [2021-03-11 00:32:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902849169] [2021-03-11 00:32:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:55,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:55,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:55,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:32:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:55,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:55,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-11 00:32:55,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213200797] [2021-03-11 00:32:55,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:32:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:55,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:32:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:32:55,578 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:55,681 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-03-11 00:32:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:32:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-11 00:32:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:55,704 INFO L225 Difference]: With dead ends: 5257 [2021-03-11 00:32:55,704 INFO L226 Difference]: Without dead ends: 4937 [2021-03-11 00:32:55,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:32:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-03-11 00:32:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-03-11 00:32:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-03-11 00:32:55,815 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-03-11 00:32:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:55,816 INFO L480 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-03-11 00:32:55,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-03-11 00:32:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:32:55,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:55,823 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:56,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:32:56,047 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 958895088, now seen corresponding path program 3 times [2021-03-11 00:32:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:56,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725653042] [2021-03-11 00:32:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:32:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725653042] [2021-03-11 00:32:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190323458] [2021-03-11 00:32:56,091 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) [2021-03-11 00:32:56,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:32:56,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:32:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:32:56,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:56,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-11 00:32:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625023248] [2021-03-11 00:32:56,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:32:56,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:32:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:32:56,230 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-03-11 00:32:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:56,851 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-03-11 00:32:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:32:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:32:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:56,897 INFO L225 Difference]: With dead ends: 11182 [2021-03-11 00:32:56,898 INFO L226 Difference]: Without dead ends: 10794 [2021-03-11 00:32:56,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:32:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-03-11 00:32:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-03-11 00:32:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-03-11 00:32:57,130 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-03-11 00:32:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:57,130 INFO L480 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-03-11 00:32:57,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-03-11 00:32:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-03-11 00:32:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:32:57,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:57,145 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:57,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-11 00:32:57,359 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1392155722, now seen corresponding path program 4 times [2021-03-11 00:32:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:57,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093433335] [2021-03-11 00:32:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:57,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093433335] [2021-03-11 00:32:57,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168004415] [2021-03-11 00:32:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:57,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:32:57,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:32:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:57,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:57,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-11 00:32:57,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821697749] [2021-03-11 00:32:57,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:32:57,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:57,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:32:57,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:32:57,561 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:57,851 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-03-11 00:32:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:32:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:32:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:57,918 INFO L225 Difference]: With dead ends: 14551 [2021-03-11 00:32:57,918 INFO L226 Difference]: Without dead ends: 13651 [2021-03-11 00:32:57,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-03-11 00:32:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-03-11 00:32:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-03-11 00:32:58,296 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-03-11 00:32:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:58,297 INFO L480 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-03-11 00:32:58,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-03-11 00:32:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:32:58,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:58,320 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:32:58,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:32:58,543 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 291561130, now seen corresponding path program 5 times [2021-03-11 00:32:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:58,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996118899] [2021-03-11 00:32:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:58,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996118899] [2021-03-11 00:32:58,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491845977] [2021-03-11 00:32:58,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:58,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:32:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:32:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:32:58,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:58,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-03-11 00:32:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802976898] [2021-03-11 00:32:58,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:32:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:32:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:32:58,796 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:59,246 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-03-11 00:32:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:32:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:32:59,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:59,357 INFO L225 Difference]: With dead ends: 24527 [2021-03-11 00:32:59,358 INFO L226 Difference]: Without dead ends: 24223 [2021-03-11 00:32:59,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:32:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-03-11 00:33:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-03-11 00:33:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-03-11 00:33:00,231 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-03-11 00:33:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:00,232 INFO L480 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-03-11 00:33:00,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-03-11 00:33:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:33:00,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:00,374 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:00,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:33:00,575 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash -166486102, now seen corresponding path program 6 times [2021-03-11 00:33:00,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:00,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010961945] [2021-03-11 00:33:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:00,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010961945] [2021-03-11 00:33:00,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241935927] [2021-03-11 00:33:00,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:00,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:33:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:00,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:00,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-03-11 00:33:00,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000147791] [2021-03-11 00:33:00,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:00,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:00,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:00,792 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:01,818 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-03-11 00:33:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:33:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:33:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:02,214 INFO L225 Difference]: With dead ends: 61524 [2021-03-11 00:33:02,214 INFO L226 Difference]: Without dead ends: 60380 [2021-03-11 00:33:02,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:33:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-03-11 00:33:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-03-11 00:33:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-03-11 00:33:03,900 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-03-11 00:33:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:03,900 INFO L480 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-03-11 00:33:03,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-03-11 00:33:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:33:03,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:03,992 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:04,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:04,192 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1888374044, now seen corresponding path program 7 times [2021-03-11 00:33:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:04,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587130654] [2021-03-11 00:33:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:04,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587130654] [2021-03-11 00:33:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073302688] [2021-03-11 00:33:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:33:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:04,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:04,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-11 00:33:04,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852357153] [2021-03-11 00:33:04,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:04,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:04,379 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:04,976 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-03-11 00:33:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:33:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:33:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:05,141 INFO L225 Difference]: With dead ends: 44403 [2021-03-11 00:33:05,141 INFO L226 Difference]: Without dead ends: 44271 [2021-03-11 00:33:05,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-03-11 00:33:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-03-11 00:33:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-03-11 00:33:06,483 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-03-11 00:33:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:06,483 INFO L480 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-03-11 00:33:06,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-03-11 00:33:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:33:06,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:06,593 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:06,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:06,807 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash -704126048, now seen corresponding path program 8 times [2021-03-11 00:33:06,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:06,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263053519] [2021-03-11 00:33:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:07,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263053519] [2021-03-11 00:33:07,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138478878] [2021-03-11 00:33:07,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:33:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:07,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:07,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-11 00:33:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163602122] [2021-03-11 00:33:07,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:33:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:33:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:33:07,348 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-03-11 00:33:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:08,439 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-03-11 00:33:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-11 00:33:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 31 [2021-03-11 00:33:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:09,044 INFO L225 Difference]: With dead ends: 66403 [2021-03-11 00:33:09,044 INFO L226 Difference]: Without dead ends: 64922 [2021-03-11 00:33:09,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:33:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-03-11 00:33:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-03-11 00:33:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-03-11 00:33:10,284 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-03-11 00:33:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:10,284 INFO L480 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-03-11 00:33:10,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-03-11 00:33:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-03-11 00:33:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:33:10,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:10,363 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:10,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-11 00:33:10,567 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 101455272, now seen corresponding path program 9 times [2021-03-11 00:33:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:10,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405777842] [2021-03-11 00:33:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:10,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405777842] [2021-03-11 00:33:10,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947094836] [2021-03-11 00:33:10,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:10,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:33:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:10,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:33:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:10,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:10,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-11 00:33:10,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234708262] [2021-03-11 00:33:10,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:10,743 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:12,142 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-03-11 00:33:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:33:12,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:33:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:12,461 INFO L225 Difference]: With dead ends: 67837 [2021-03-11 00:33:12,461 INFO L226 Difference]: Without dead ends: 67411 [2021-03-11 00:33:12,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:33:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-03-11 00:33:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-03-11 00:33:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-03-11 00:33:14,260 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-03-11 00:33:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:14,260 INFO L480 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-03-11 00:33:14,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-03-11 00:33:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-11 00:33:14,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:14,353 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:14,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:14,553 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 903160218, now seen corresponding path program 10 times [2021-03-11 00:33:14,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:14,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045512293] [2021-03-11 00:33:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:14,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045512293] [2021-03-11 00:33:14,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896225162] [2021-03-11 00:33:14,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:33:14,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:14,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:33:14,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:33:14,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:14,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-11 00:33:14,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062558095] [2021-03-11 00:33:14,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:14,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:14,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:14,736 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:15,583 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-03-11 00:33:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:33:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-11 00:33:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:15,791 INFO L225 Difference]: With dead ends: 54540 [2021-03-11 00:33:15,792 INFO L226 Difference]: Without dead ends: 54365 [2021-03-11 00:33:15,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-03-11 00:33:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-03-11 00:33:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-03-11 00:33:17,203 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-03-11 00:33:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:17,203 INFO L480 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-03-11 00:33:17,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-03-11 00:33:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-11 00:33:17,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:17,321 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:17,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:33:17,521 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:17,522 INFO L82 PathProgramCache]: Analyzing trace with hash 108399622, now seen corresponding path program 11 times [2021-03-11 00:33:17,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:17,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638135790] [2021-03-11 00:33:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:17,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638135790] [2021-03-11 00:33:17,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201378610] [2021-03-11 00:33:17,580 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) [2021-03-11 00:33:17,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:33:17,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:33:17,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:33:17,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:17,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-11 00:33:17,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867794964] [2021-03-11 00:33:17,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:17,695 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-03-11 00:33:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:18,679 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-03-11 00:33:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:33:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 33 [2021-03-11 00:33:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:18,939 INFO L225 Difference]: With dead ends: 55576 [2021-03-11 00:33:18,939 INFO L226 Difference]: Without dead ends: 55382 [2021-03-11 00:33:18,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-03-11 00:33:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-03-11 00:33:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-03-11 00:33:20,600 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-03-11 00:33:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:20,601 INFO L480 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-03-11 00:33:20,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-03-11 00:33:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-03-11 00:33:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-11 00:33:20,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:20,708 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:20,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:20,909 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1275302974, now seen corresponding path program 12 times [2021-03-11 00:33:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:20,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812529991] [2021-03-11 00:33:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:20,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812529991] [2021-03-11 00:33:20,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28628464] [2021-03-11 00:33:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:20,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:33:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:33:21,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:21,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-11 00:33:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932587299] [2021-03-11 00:33:21,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:33:21,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:33:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:33:21,083 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-03-11 00:33:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:23,113 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-03-11 00:33:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:33:23,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 33 [2021-03-11 00:33:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:24,451 INFO L225 Difference]: With dead ends: 141398 [2021-03-11 00:33:24,452 INFO L226 Difference]: Without dead ends: 140699 [2021-03-11 00:33:24,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:33:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-03-11 00:33:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-03-11 00:33:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-03-11 00:33:28,449 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-03-11 00:33:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:28,449 INFO L480 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-03-11 00:33:28,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-03-11 00:33:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-03-11 00:33:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-11 00:33:28,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:28,713 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:28,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-11 00:33:28,914 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1471051102, now seen corresponding path program 13 times [2021-03-11 00:33:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13954286] [2021-03-11 00:33:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:33:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13954286] [2021-03-11 00:33:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135813649] [2021-03-11 00:33:28,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:29,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:29,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-03-11 00:33:29,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672216418] [2021-03-11 00:33:29,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:29,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:29,125 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:32,409 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-03-11 00:33:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:33:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-11 00:33:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:33,666 INFO L225 Difference]: With dead ends: 205700 [2021-03-11 00:33:33,666 INFO L226 Difference]: Without dead ends: 204198 [2021-03-11 00:33:33,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:33:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-03-11 00:33:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-03-11 00:33:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-03-11 00:33:41,481 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-03-11 00:33:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:41,481 INFO L480 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-03-11 00:33:41,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-03-11 00:33:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-11 00:33:43,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:43,143 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:33:43,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-11 00:33:43,367 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -233402852, now seen corresponding path program 14 times [2021-03-11 00:33:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:43,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615689682] [2021-03-11 00:33:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615689682] [2021-03-11 00:33:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994713909] [2021-03-11 00:33:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:43,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:33:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-11 00:33:43,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:43,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-11 00:33:43,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166720973] [2021-03-11 00:33:43,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:33:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:33:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:33:43,531 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:48,530 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-03-11 00:33:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:33:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-11 00:33:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:51,520 INFO L225 Difference]: With dead ends: 389060 [2021-03-11 00:33:51,520 INFO L226 Difference]: Without dead ends: 387773 [2021-03-11 00:33:51,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:33:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-03-11 00:34:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-03-11 00:34:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-03-11 00:34:06,297 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-03-11 00:34:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:06,297 INFO L480 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-03-11 00:34:06,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-03-11 00:34:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-11 00:34:07,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:07,382 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:07,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:34:07,583 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-03-11 00:34:07,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:07,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307976504] [2021-03-11 00:34:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:07,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307976504] [2021-03-11 00:34:07,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358113049] [2021-03-11 00:34:07,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:34:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-11 00:34:07,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:07,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-11 00:34:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197982279] [2021-03-11 00:34:07,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:07,745 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-03-11 00:34:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:25,486 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-03-11 00:34:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:34:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 35 [2021-03-11 00:34:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:38,055 INFO L225 Difference]: With dead ends: 1050714 [2021-03-11 00:34:38,055 INFO L226 Difference]: Without dead ends: 1048522 [2021-03-11 00:34:38,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:34:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-03-11 00:35:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-03-11 00:35:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-03-11 00:35:23,580 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-03-11 00:35:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:23,581 INFO L480 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-03-11 00:35:23,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-03-11 00:35:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-03-11 00:35:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-11 00:35:26,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:26,900 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:35:27,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-11 00:35:27,115 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-03-11 00:35:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:27,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664970440] [2021-03-11 00:35:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664970440] [2021-03-11 00:35:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948492931] [2021-03-11 00:35:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:27,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:35:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:35:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:35:27,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:27,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-11 00:35:27,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643255698] [2021-03-11 00:35:27,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:35:27,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:27,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:35:27,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:35:27,298 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:44,142 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-03-11 00:35:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:35:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-11 00:35:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:54,482 INFO L225 Difference]: With dead ends: 955483 [2021-03-11 00:35:54,482 INFO L226 Difference]: Without dead ends: 947993 [2021-03-11 00:35:54,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:35:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-03-11 00:36:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-03-11 00:36:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-03-11 00:36:39,452 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-03-11 00:36:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:39,452 INFO L480 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-03-11 00:36:39,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-03-11 00:36:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-11 00:36:44,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:44,209 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:36:44,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:36:44,423 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:44,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1825465252, now seen corresponding path program 17 times [2021-03-11 00:36:44,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:44,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15921080] [2021-03-11 00:36:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:36:44,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15921080] [2021-03-11 00:36:44,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230320228] [2021-03-11 00:36:44,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:44,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:36:44,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:36:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-11 00:36:44,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:44,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-11 00:36:44,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656693048] [2021-03-11 00:36:44,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:36:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:36:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:36:44,663 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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)