/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/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:53:48,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:53:48,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:53:48,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:53:48,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 22:53:48,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:53:48,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:53:48,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:53:48,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:53:48,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:53:48,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:53:48,310 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:53:48,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:53:48,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:53:48,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:53:48,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:53:48,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:53:48,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:53:48,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:53:48,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:53:48,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:53:48,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:53:48,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:53:48,605 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:53:48,606 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:53:48,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-03-10 22:53:48,617 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-03-10 22:53:48,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:53:48,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:53:48,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:53:48,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:53:48,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:53:48,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:53:48,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:53:48,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:53:48,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:53:48,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... [2021-03-10 22:53:48,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:53:48,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:53:48,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:53:48,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:53:48,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:53:48,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:53:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:53:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:53:48,739 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:53:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:53:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:53:48,739 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:53:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:53:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:53:48,739 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:53:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:53:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:53:48,739 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:53:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:53:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:53:48,740 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:53:48,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:53:48,980 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:53:48,982 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:53:48 BoogieIcfgContainer [2021-03-10 22:53:48,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:53:48,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:53:48,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:53:48,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:53:48,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:53:48" (1/2) ... [2021-03-10 22:53:48,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfaac99 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:53:48, skipping insertion in model container [2021-03-10 22:53:48,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:53:48" (2/2) ... [2021-03-10 22:53:48,987 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-03-10 22:53:48,991 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:53:48,991 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:53:48,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:53:48,995 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:53:49,051 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 22:53:49,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 22:53:49,077 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:53:49,077 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:53:49,077 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:53:49,077 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:53:49,077 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:53:49,077 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:53:49,077 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:53:49,078 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:53:49,084 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-03-10 22:53:49,130 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:53:49,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:49,152 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] [2021-03-10 22:53:49,152 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash -412067460, now seen corresponding path program 1 times [2021-03-10 22:53:49,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:49,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766412661] [2021-03-10 22:53:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:49,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766412661] [2021-03-10 22:53:49,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:53:49,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:53:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146765435] [2021-03-10 22:53:49,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:53:49,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:53:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:53:49,314 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:49,368 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-03-10 22:53:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:53:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:53:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:49,386 INFO L225 Difference]: With dead ends: 857 [2021-03-10 22:53:49,386 INFO L226 Difference]: Without dead ends: 732 [2021-03-10 22:53:49,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:53:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-03-10 22:53:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-03-10 22:53:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-03-10 22:53:49,490 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-03-10 22:53:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:49,491 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-03-10 22:53:49,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-03-10 22:53:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:53:49,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:49,498 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] [2021-03-10 22:53:49,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:53:49,498 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 571605306, now seen corresponding path program 1 times [2021-03-10 22:53:49,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:49,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074627930] [2021-03-10 22:53:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074627930] [2021-03-10 22:53:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078364102] [2021-03-10 22:53:49,572 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 [2021-03-10 22:53:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:53:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:49,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:49,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-03-10 22:53:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591615966] [2021-03-10 22:53:49,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:53:49,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:49,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:53:49,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:53:49,756 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:49,860 INFO L93 Difference]: Finished difference Result 1528 states and 5659 transitions. [2021-03-10 22:53:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:53:49,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:53:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:49,871 INFO L225 Difference]: With dead ends: 1528 [2021-03-10 22:53:49,871 INFO L226 Difference]: Without dead ends: 1528 [2021-03-10 22:53:49,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:53:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-03-10 22:53:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 838. [2021-03-10 22:53:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.771804062126643) internal successors, (3157), 837 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 3157 transitions. [2021-03-10 22:53:49,948 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 3157 transitions. Word has length 24 [2021-03-10 22:53:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 3157 transitions. [2021-03-10 22:53:49,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 3157 transitions. [2021-03-10 22:53:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:53:49,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:49,951 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] [2021-03-10 22:53:50,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 22:53:50,168 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2854590, now seen corresponding path program 1 times [2021-03-10 22:53:50,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:50,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642331383] [2021-03-10 22:53:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:50,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642331383] [2021-03-10 22:53:50,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:53:50,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:53:50,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324073520] [2021-03-10 22:53:50,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:53:50,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:53:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:53:50,256 INFO L87 Difference]: Start difference. First operand 838 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:50,315 INFO L93 Difference]: Finished difference Result 1187 states and 4245 transitions. [2021-03-10 22:53:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:53:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:53:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:50,322 INFO L225 Difference]: With dead ends: 1187 [2021-03-10 22:53:50,322 INFO L226 Difference]: Without dead ends: 1077 [2021-03-10 22:53:50,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:53:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-03-10 22:53:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 806. [2021-03-10 22:53:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.7950310559006213) internal successors, (3055), 805 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 3055 transitions. [2021-03-10 22:53:50,356 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 3055 transitions. Word has length 24 [2021-03-10 22:53:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:50,356 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 3055 transitions. [2021-03-10 22:53:50,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 3055 transitions. [2021-03-10 22:53:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:53:50,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:50,359 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] [2021-03-10 22:53:50,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:53:50,359 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash -257890470, now seen corresponding path program 2 times [2021-03-10 22:53:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:50,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705388004] [2021-03-10 22:53:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:50,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705388004] [2021-03-10 22:53:50,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:53:50,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:53:50,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371117893] [2021-03-10 22:53:50,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:53:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:53:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:53:50,407 INFO L87 Difference]: Start difference. First operand 806 states and 3055 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:50,439 INFO L93 Difference]: Finished difference Result 1023 states and 3746 transitions. [2021-03-10 22:53:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:53:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:53:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:50,445 INFO L225 Difference]: With dead ends: 1023 [2021-03-10 22:53:50,445 INFO L226 Difference]: Without dead ends: 1023 [2021-03-10 22:53:50,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:53:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-03-10 22:53:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 848. [2021-03-10 22:53:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.7485242030696577) internal successors, (3175), 847 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3175 transitions. [2021-03-10 22:53:50,471 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3175 transitions. Word has length 24 [2021-03-10 22:53:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:50,471 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 3175 transitions. [2021-03-10 22:53:50,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3175 transitions. [2021-03-10 22:53:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:53:50,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:50,473 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] [2021-03-10 22:53:50,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:53:50,473 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 370394274, now seen corresponding path program 2 times [2021-03-10 22:53:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:50,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515353516] [2021-03-10 22:53:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515353516] [2021-03-10 22:53:50,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:53:50,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:53:50,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568214373] [2021-03-10 22:53:50,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:53:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:50,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:53:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:53:50,501 INFO L87 Difference]: Start difference. First operand 848 states and 3175 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:50,535 INFO L93 Difference]: Finished difference Result 1118 states and 4122 transitions. [2021-03-10 22:53:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:53:50,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:53:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:50,542 INFO L225 Difference]: With dead ends: 1118 [2021-03-10 22:53:50,542 INFO L226 Difference]: Without dead ends: 1048 [2021-03-10 22:53:50,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:53:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-03-10 22:53:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-03-10 22:53:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.7671711292200234) internal successors, (3236), 859 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3236 transitions. [2021-03-10 22:53:50,567 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3236 transitions. Word has length 24 [2021-03-10 22:53:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:50,568 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 3236 transitions. [2021-03-10 22:53:50,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3236 transitions. [2021-03-10 22:53:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:53:50,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:50,570 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] [2021-03-10 22:53:50,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:53:50,571 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 3 times [2021-03-10 22:53:50,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:50,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762202931] [2021-03-10 22:53:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762202931] [2021-03-10 22:53:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188303759] [2021-03-10 22:53:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:53:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:53:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:50,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:50,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-03-10 22:53:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631871093] [2021-03-10 22:53:50,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:53:50,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:53:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:53:50,706 INFO L87 Difference]: Start difference. First operand 860 states and 3236 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:50,754 INFO L93 Difference]: Finished difference Result 882 states and 3347 transitions. [2021-03-10 22:53:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:53:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:53:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:50,760 INFO L225 Difference]: With dead ends: 882 [2021-03-10 22:53:50,760 INFO L226 Difference]: Without dead ends: 822 [2021-03-10 22:53:50,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:53:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-03-10 22:53:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 702. [2021-03-10 22:53:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.843081312410842) internal successors, (2694), 701 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2694 transitions. [2021-03-10 22:53:50,782 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2694 transitions. Word has length 24 [2021-03-10 22:53:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:50,784 INFO L480 AbstractCegarLoop]: Abstraction has 702 states and 2694 transitions. [2021-03-10 22:53:50,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2694 transitions. [2021-03-10 22:53:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:53:50,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:50,787 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:53:51,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:51,004 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1935675546, now seen corresponding path program 1 times [2021-03-10 22:53:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:51,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465456647] [2021-03-10 22:53:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:51,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465456647] [2021-03-10 22:53:51,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529989864] [2021-03-10 22:53:51,066 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 [2021-03-10 22:53:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:51,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:53:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:51,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:51,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 22:53:51,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999186452] [2021-03-10 22:53:51,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:53:51,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:53:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:53:51,193 INFO L87 Difference]: Start difference. First operand 702 states and 2694 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:51,271 INFO L93 Difference]: Finished difference Result 926 states and 3582 transitions. [2021-03-10 22:53:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:53:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:53:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:51,277 INFO L225 Difference]: With dead ends: 926 [2021-03-10 22:53:51,277 INFO L226 Difference]: Without dead ends: 926 [2021-03-10 22:53:51,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:53:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-03-10 22:53:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 802. [2021-03-10 22:53:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-03-10 22:53:51,302 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-03-10 22:53:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:51,302 INFO L480 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-03-10 22:53:51,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-03-10 22:53:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:53:51,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:51,306 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:53:51,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:51,522 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1942494820, now seen corresponding path program 1 times [2021-03-10 22:53:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:51,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989237002] [2021-03-10 22:53:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989237002] [2021-03-10 22:53:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799934959] [2021-03-10 22:53:51,606 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 [2021-03-10 22:53:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:53:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:51,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:51,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-03-10 22:53:51,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128964085] [2021-03-10 22:53:51,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:53:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:53:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:53:51,713 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:51,773 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-03-10 22:53:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:53:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:53:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:51,784 INFO L225 Difference]: With dead ends: 1509 [2021-03-10 22:53:51,784 INFO L226 Difference]: Without dead ends: 1509 [2021-03-10 22:53:51,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:53:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-03-10 22:53:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-03-10 22:53:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-03-10 22:53:51,815 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-03-10 22:53:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:51,815 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-03-10 22:53:51,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-03-10 22:53:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:53:51,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:51,819 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:53:52,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:52,035 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-03-10 22:53:52,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:52,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174660305] [2021-03-10 22:53:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:52,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174660305] [2021-03-10 22:53:52,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082708550] [2021-03-10 22:53:52,073 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 [2021-03-10 22:53:52,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:53:52,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:53:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:52,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 22:53:52,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-03-10 22:53:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326605279] [2021-03-10 22:53:52,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:53:52,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:53:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:53:52,175 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:52,209 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-03-10 22:53:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:53:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:53:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:52,215 INFO L225 Difference]: With dead ends: 1136 [2021-03-10 22:53:52,215 INFO L226 Difference]: Without dead ends: 1088 [2021-03-10 22:53:52,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:53:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-03-10 22:53:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-03-10 22:53:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-03-10 22:53:52,239 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-03-10 22:53:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:52,239 INFO L480 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-03-10 22:53:52,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-03-10 22:53:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:53:52,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:52,241 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, 1] [2021-03-10 22:53:52,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:52,460 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash 319966110, now seen corresponding path program 1 times [2021-03-10 22:53:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:52,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119855144] [2021-03-10 22:53:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:52,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119855144] [2021-03-10 22:53:52,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287585833] [2021-03-10 22:53:52,516 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 [2021-03-10 22:53:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:53:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-10 22:53:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295809104] [2021-03-10 22:53:52,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:53:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:53:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:53:52,644 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-03-10 22:53:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:52,739 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-03-10 22:53:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:53:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 30 [2021-03-10 22:53:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:52,762 INFO L225 Difference]: With dead ends: 4025 [2021-03-10 22:53:52,762 INFO L226 Difference]: Without dead ends: 3705 [2021-03-10 22:53:52,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:53:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-03-10 22:53:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-03-10 22:53:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-03-10 22:53:52,877 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-03-10 22:53:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:52,878 INFO L480 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-03-10 22:53:52,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-03-10 22:53:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-03-10 22:53:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:52,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:52,886 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, 1] [2021-03-10 22:53:53,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:53,099 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash -874031780, now seen corresponding path program 2 times [2021-03-10 22:53:53,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:53,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186695847] [2021-03-10 22:53:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:53,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186695847] [2021-03-10 22:53:53,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338019587] [2021-03-10 22:53:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:53,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:53:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:53:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:53,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:53,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 22:53:53,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482811443] [2021-03-10 22:53:53,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:53:53,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:53:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:53:53,335 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:53,583 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-03-10 22:53:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:53:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 32 [2021-03-10 22:53:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:53,630 INFO L225 Difference]: With dead ends: 11823 [2021-03-10 22:53:53,630 INFO L226 Difference]: Without dead ends: 11823 [2021-03-10 22:53:53,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:53:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-03-10 22:53:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-03-10 22:53:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-03-10 22:53:53,835 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-03-10 22:53:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:53,835 INFO L480 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-03-10 22:53:53,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-03-10 22:53:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:53,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:53,848 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, 1] [2021-03-10 22:53:54,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:54,065 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1773521824, now seen corresponding path program 3 times [2021-03-10 22:53:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:54,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006683253] [2021-03-10 22:53:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:54,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006683253] [2021-03-10 22:53:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973313297] [2021-03-10 22:53:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:54,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:53:54,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:53:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:54,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:54,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 22:53:54,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601423513] [2021-03-10 22:53:54,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:53:54,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:53:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:53:54,301 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-03-10 22:53:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:54,959 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-03-10 22:53:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:53:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 32 [2021-03-10 22:53:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:55,015 INFO L225 Difference]: With dead ends: 18640 [2021-03-10 22:53:55,016 INFO L226 Difference]: Without dead ends: 17252 [2021-03-10 22:53:55,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:53:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-03-10 22:53:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-03-10 22:53:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-03-10 22:53:55,359 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-03-10 22:53:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:55,359 INFO L480 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-03-10 22:53:55,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-03-10 22:53:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-03-10 22:53:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:55,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:55,383 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, 1] [2021-03-10 22:53:55,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 22:53:55,601 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-03-10 22:53:55,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:55,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13954297] [2021-03-10 22:53:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:55,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13954297] [2021-03-10 22:53:55,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809834747] [2021-03-10 22:53:55,678 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) [2021-03-10 22:53:55,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:53:55,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:53:55,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:55,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:55,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 22:53:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042181324] [2021-03-10 22:53:55,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:53:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:53:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:53:55,799 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:55,946 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-03-10 22:53:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:53:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:53:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:55,992 INFO L225 Difference]: With dead ends: 13296 [2021-03-10 22:53:55,993 INFO L226 Difference]: Without dead ends: 13128 [2021-03-10 22:53:55,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:53:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-03-10 22:53:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-03-10 22:53:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-03-10 22:53:56,364 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-03-10 22:53:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:56,365 INFO L480 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-03-10 22:53:56,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-03-10 22:53:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:56,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:56,386 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, 1] [2021-03-10 22:53:56,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:56,591 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-03-10 22:53:56,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:56,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93999153] [2021-03-10 22:53:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:56,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93999153] [2021-03-10 22:53:56,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854972634] [2021-03-10 22:53:56,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:56,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:53:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:53:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:56,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:56,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-10 22:53:56,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536701787] [2021-03-10 22:53:56,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:53:56,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:53:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:53:56,830 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:57,013 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-03-10 22:53:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:53:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:53:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:57,161 INFO L225 Difference]: With dead ends: 17125 [2021-03-10 22:53:57,161 INFO L226 Difference]: Without dead ends: 17125 [2021-03-10 22:53:57,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:53:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-03-10 22:53:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-03-10 22:53:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-03-10 22:53:57,481 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-03-10 22:53:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:57,481 INFO L480 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-03-10 22:53:57,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-03-10 22:53:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:57,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:57,506 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, 1] [2021-03-10 22:53:57,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:57,722 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-03-10 22:53:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:57,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921973353] [2021-03-10 22:53:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:57,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921973353] [2021-03-10 22:53:57,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716238439] [2021-03-10 22:53:57,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:57,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:53:57,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:53:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:53:57,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:57,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 22:53:57,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342538079] [2021-03-10 22:53:57,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:53:57,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:57,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:53:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:53:57,874 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:58,091 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-03-10 22:53:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:53:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:53:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:58,143 INFO L225 Difference]: With dead ends: 16571 [2021-03-10 22:53:58,143 INFO L226 Difference]: Without dead ends: 16190 [2021-03-10 22:53:58,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:53:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-03-10 22:53:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-03-10 22:53:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-03-10 22:53:58,454 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-03-10 22:53:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:58,454 INFO L480 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-03-10 22:53:58,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-03-10 22:53:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:58,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:58,479 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, 1] [2021-03-10 22:53:58,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:53:58,694 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:58,695 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-03-10 22:53:58,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:58,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410077344] [2021-03-10 22:53:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410077344] [2021-03-10 22:53:58,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983866525] [2021-03-10 22:53:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:53:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:53:58,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:58,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 22:53:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130904144] [2021-03-10 22:53:58,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:53:58,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:53:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:53:58,947 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:59,188 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-03-10 22:53:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:53:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:53:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:59,324 INFO L225 Difference]: With dead ends: 19431 [2021-03-10 22:53:59,324 INFO L226 Difference]: Without dead ends: 19035 [2021-03-10 22:53:59,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:53:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-03-10 22:53:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-03-10 22:53:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-03-10 22:53:59,717 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-03-10 22:53:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:59,717 INFO L480 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-03-10 22:53:59,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-03-10 22:53:59,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:53:59,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:59,751 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, 1] [2021-03-10 22:53:59,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 22:53:59,952 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-03-10 22:53:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:59,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655270873] [2021-03-10 22:53:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:54:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655270873] [2021-03-10 22:54:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229888016] [2021-03-10 22:54:00,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:54:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:54:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:54:00,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:00,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 22:54:00,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960489043] [2021-03-10 22:54:00,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:54:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:54:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:54:00,121 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-03-10 22:54:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:01,249 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-03-10 22:54:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:54:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 32 [2021-03-10 22:54:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:01,484 INFO L225 Difference]: With dead ends: 59639 [2021-03-10 22:54:01,484 INFO L226 Difference]: Without dead ends: 58849 [2021-03-10 22:54:01,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:54:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-03-10 22:54:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-03-10 22:54:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-03-10 22:54:02,871 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-03-10 22:54:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:02,871 INFO L480 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-03-10 22:54:02,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-03-10 22:54:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-03-10 22:54:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:54:02,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:02,934 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, 1] [2021-03-10 22:54:03,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:54:03,134 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-03-10 22:54:03,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:03,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895823666] [2021-03-10 22:54:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:54:03,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895823666] [2021-03-10 22:54:03,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598761358] [2021-03-10 22:54:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:03,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:54:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:54:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:54:03,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:03,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-03-10 22:54:03,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136294378] [2021-03-10 22:54:03,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:54:03,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:54:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:54:03,269 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:03,753 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-03-10 22:54:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:54:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:54:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:03,876 INFO L225 Difference]: With dead ends: 31277 [2021-03-10 22:54:03,876 INFO L226 Difference]: Without dead ends: 30802 [2021-03-10 22:54:03,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:54:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-03-10 22:54:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-03-10 22:54:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-03-10 22:54:04,688 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-03-10 22:54:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:04,688 INFO L480 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-03-10 22:54:04,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-03-10 22:54:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:54:04,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:04,923 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, 1] [2021-03-10 22:54:05,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:05,127 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-03-10 22:54:05,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:05,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941785825] [2021-03-10 22:54:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:54:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941785825] [2021-03-10 22:54:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668940079] [2021-03-10 22:54:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:05,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:54:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:54:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:54:05,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:05,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 22:54:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713515113] [2021-03-10 22:54:05,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:54:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:54:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:54:05,261 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 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) [2021-03-10 22:54:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:06,162 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-03-10 22:54:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:54:06,162 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 34 [2021-03-10 22:54:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:06,567 INFO L225 Difference]: With dead ends: 54817 [2021-03-10 22:54:06,567 INFO L226 Difference]: Without dead ends: 53957 [2021-03-10 22:54:06,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:54:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-03-10 22:54:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-03-10 22:54:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-03-10 22:54:07,632 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-03-10 22:54:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:07,632 INFO L480 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-03-10 22:54:07,632 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) [2021-03-10 22:54:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-03-10 22:54:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:54:07,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:07,714 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, 1] [2021-03-10 22:54:07,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:07,915 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-03-10 22:54:07,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:07,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971550838] [2021-03-10 22:54:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:54:07,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971550838] [2021-03-10 22:54:07,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817234423] [2021-03-10 22:54:07,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:08,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:54:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:54:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:54:08,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:08,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 22:54:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450275474] [2021-03-10 22:54:08,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:54:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:54:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:54:08,083 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 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) [2021-03-10 22:54:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:09,213 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-03-10 22:54:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:54:09,213 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 34 [2021-03-10 22:54:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:09,447 INFO L225 Difference]: With dead ends: 59653 [2021-03-10 22:54:09,447 INFO L226 Difference]: Without dead ends: 58480 [2021-03-10 22:54:09,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:54:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-03-10 22:54:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-03-10 22:54:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-03-10 22:54:11,059 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-03-10 22:54:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:11,059 INFO L480 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-03-10 22:54:11,059 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) [2021-03-10 22:54:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-03-10 22:54:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:54:11,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:11,146 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, 1] [2021-03-10 22:54:11,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:11,346 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1889373340, now seen corresponding path program 12 times [2021-03-10 22:54:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580963354] [2021-03-10 22:54:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:54:11,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580963354] [2021-03-10 22:54:11,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836189445] [2021-03-10 22:54:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:11,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:54:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:54:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:54:11,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:11,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-03-10 22:54:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724961518] [2021-03-10 22:54:11,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:54:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:54:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:54:11,526 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:12,746 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-03-10 22:54:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:54:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 36 [2021-03-10 22:54:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:13,227 INFO L225 Difference]: With dead ends: 101501 [2021-03-10 22:54:13,227 INFO L226 Difference]: Without dead ends: 100925 [2021-03-10 22:54:13,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:54:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-03-10 22:54:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-03-10 22:54:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-03-10 22:54:15,796 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-03-10 22:54:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:15,796 INFO L480 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-03-10 22:54:15,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-03-10 22:54:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:54:15,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:15,998 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, 1] [2021-03-10 22:54:16,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 22:54:16,203 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-03-10 22:54:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:16,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732111723] [2021-03-10 22:54:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:54:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732111723] [2021-03-10 22:54:16,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004108583] [2021-03-10 22:54:16,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:54:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:54:16,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:16,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 22:54:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735548775] [2021-03-10 22:54:16,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:54:16,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:54:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:54:16,370 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:20,617 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-03-10 22:54:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:54:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 22:54:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:23,100 INFO L225 Difference]: With dead ends: 345279 [2021-03-10 22:54:23,100 INFO L226 Difference]: Without dead ends: 340111 [2021-03-10 22:54:23,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:54:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-03-10 22:54:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-03-10 22:54:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-03-10 22:54:33,912 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-03-10 22:54:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:33,912 INFO L480 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-03-10 22:54:33,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-03-10 22:54:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:54:34,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:34,610 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, 1] [2021-03-10 22:54:34,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:54:34,810 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-03-10 22:54:34,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:34,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816809667] [2021-03-10 22:54:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:54:34,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816809667] [2021-03-10 22:54:34,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974337537] [2021-03-10 22:54:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:54:34,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:54:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:54:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:54:34,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:34,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 22:54:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371972487] [2021-03-10 22:54:34,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:54:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:54:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:54:34,963 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-03-10 22:54:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:38,063 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-03-10 22:54:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:54:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 36 [2021-03-10 22:54:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:39,391 INFO L225 Difference]: With dead ends: 231776 [2021-03-10 22:54:39,391 INFO L226 Difference]: Without dead ends: 229312 [2021-03-10 22:54:39,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:54:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-03-10 22:54:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-03-10 22:54:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-03-10 22:54:48,454 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-03-10 22:54:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:48,455 INFO L480 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-03-10 22:54:48,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-03-10 22:54:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-03-10 22:54:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 22:54:49,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:49,236 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-03-10 22:54:49,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:54:49,437 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1958295198, now seen corresponding path program 15 times [2021-03-10 22:54:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:49,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389435263] [2021-03-10 22:54:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:54:49,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389435263] [2021-03-10 22:54:49,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469719980] [2021-03-10 22:54:49,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:49,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:54:49,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:54:49,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:54:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 22:54:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205353209] [2021-03-10 22:54:49,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:54:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:54:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:54:49,641 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:55,956 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-03-10 22:54:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:54:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 22:54:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:59,818 INFO L225 Difference]: With dead ends: 502202 [2021-03-10 22:54:59,818 INFO L226 Difference]: Without dead ends: 498334 [2021-03-10 22:54:59,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:55:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-03-10 22:55:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-03-10 22:55:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:55:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-03-10 22:55:19,942 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-03-10 22:55:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:55:19,942 INFO L480 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-03-10 22:55:19,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:55:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-03-10 22:55:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 22:55:23,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:55:23,669 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-03-10 22:55:23,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 22:55:23,891 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:55:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:55:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash -79715748, now seen corresponding path program 16 times [2021-03-10 22:55:23,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:55:23,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758253467] [2021-03-10 22:55:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:55:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:55:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:55:24,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758253467] [2021-03-10 22:55:24,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164663796] [2021-03-10 22:55:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:55:24,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:55:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:55:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:55:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:55:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:55:24,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:55:24,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 22:55:24,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213404208] [2021-03-10 22:55:24,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:55:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:55:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:55:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:55:24,175 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:55:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:55:38,987 INFO L93 Difference]: Finished difference Result 1120732 states and 5108769 transitions. [2021-03-10 22:55:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:55:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 22:55:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:55:48,865 INFO L225 Difference]: With dead ends: 1120732 [2021-03-10 22:55:48,865 INFO L226 Difference]: Without dead ends: 1114512 [2021-03-10 22:55:48,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:55:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114512 states. [2021-03-10 22:56:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114512 to 448533. [2021-03-10 22:56:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448533 states, 448532 states have (on average 4.7567286169102765) internal successors, (2133545), 448532 states have internal predecessors, (2133545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:56:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448533 states to 448533 states and 2133545 transitions. [2021-03-10 22:56:25,566 INFO L78 Accepts]: Start accepts. Automaton has 448533 states and 2133545 transitions. Word has length 40 [2021-03-10 22:56:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:56:25,566 INFO L480 AbstractCegarLoop]: Abstraction has 448533 states and 2133545 transitions. [2021-03-10 22:56:25,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:56:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 448533 states and 2133545 transitions. [2021-03-10 22:56:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 22:56:30,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:56:30,280 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-03-10 22:56:30,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:56:30,511 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:56:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:56:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1291496032, now seen corresponding path program 17 times [2021-03-10 22:56:30,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:56:30,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303716009] [2021-03-10 22:56:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:56:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:56:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:56:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303716009] [2021-03-10 22:56:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319025928] [2021-03-10 22:56:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:56:30,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:56:30,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:56:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:56:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:56:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:56:30,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:56:30,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 22:56:30,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848529547] [2021-03-10 22:56:30,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:56:30,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:56:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:56:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:56:30,786 INFO L87 Difference]: Start difference. First operand 448533 states and 2133545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:56:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:56:56,633 INFO L93 Difference]: Finished difference Result 1565237 states and 7251935 transitions. [2021-03-10 22:56:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 22:56:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 22:56:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:08,777 INFO L225 Difference]: With dead ends: 1565237 [2021-03-10 22:57:08,778 INFO L226 Difference]: Without dead ends: 1521056 [2021-03-10 22:57:08,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 22:57:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521056 states. [2021-03-10 22:57:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521056 to 810028. [2021-03-10 22:57:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810028 states, 810027 states have (on average 4.736152004809716) internal successors, (3836411), 810027 states have internal predecessors, (3836411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810028 states to 810028 states and 3836411 transitions. [2021-03-10 22:58:06,419 INFO L78 Accepts]: Start accepts. Automaton has 810028 states and 3836411 transitions. Word has length 40 [2021-03-10 22:58:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:58:06,420 INFO L480 AbstractCegarLoop]: Abstraction has 810028 states and 3836411 transitions. [2021-03-10 22:58:06,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 810028 states and 3836411 transitions. [2021-03-10 22:58:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 22:58:13,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:58:13,236 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-03-10 22:58:13,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:13,475 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:58:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:58:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1485289540, now seen corresponding path program 18 times [2021-03-10 22:58:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:58:13,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982718337] [2021-03-10 22:58:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:58:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:58:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:58:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982718337] [2021-03-10 22:58:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185245592] [2021-03-10 22:58:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:13,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:58:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:58:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:58:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:58:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:58:13,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:58:13,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 22:58:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401812769] [2021-03-10 22:58:13,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:58:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:58:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:58:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:58:13,713 INFO L87 Difference]: Start difference. First operand 810028 states and 3836411 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)