/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:59:16,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:59:16,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:59:16,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:59:16,796 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-Separate.epf [2021-06-05 14:59:16,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:59:16,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:59:16,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:59:16,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:59:16,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:59:16,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:59:16,826 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:59:16,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:59:16,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:59:16,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:59:16,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:59:16,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:59:16,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:59:16,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:59:16,829 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:59:16,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:59:17,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:59:17,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:59:17,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:59:17,102 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:59:17,103 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:59:17,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-06-05 14:59:17,104 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-06-05 14:59:17,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:59:17,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:59:17,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:59:17,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:59:17,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:59:17,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:59:17,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:59:17,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:59:17,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:59:17,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/1) ... [2021-06-05 14:59:17,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:59:17,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:59:17,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:59:17,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:59:17,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (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 [2021-06-05 14:59:17,243 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:59:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:59:17,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:59:17,244 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:59:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:59:17,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:59:17,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:59:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:59:17,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:59:17,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:59:17,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:59:17,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:59:17,246 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:59:17,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:59:17,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:59:17,397 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:59:17 BoogieIcfgContainer [2021-06-05 14:59:17,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:59:17,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:59:17,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:59:17,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:59:17,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:59:17" (1/2) ... [2021-06-05 14:59:17,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646c782e and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:59:17, skipping insertion in model container [2021-06-05 14:59:17,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:59:17" (2/2) ... [2021-06-05 14:59:17,402 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-06-05 14:59:17,406 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:59:17,406 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:59:17,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:59:17,406 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:59:17,436 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:59:17,456 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:59:17,468 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:59:17,468 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:59:17,468 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:59:17,468 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:59:17,468 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:59:17,468 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:59:17,468 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:59:17,468 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:59:17,474 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-06-05 14:59:17,544 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:59:17,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:17,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,570 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-06-05 14:59:17,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791817536] [2021-06-05 14:59:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:17,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791817536] [2021-06-05 14:59:17,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791817536] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:17,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:17,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:59:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683783678] [2021-06-05 14:59:17,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:59:17,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:59:17,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:17,697 INFO L87 Difference]: Start difference. First operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:17,731 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-06-05 14:59:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:59:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:59:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:17,749 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 14:59:17,749 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 14:59:17,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 14:59:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-06-05 14:59:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.8705179282868527) internal successors, (3886), 1004 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-06-05 14:59:17,834 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-06-05 14:59:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:17,834 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-06-05 14:59:17,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-06-05 14:59:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:59:17,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:17,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:59:17,840 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-06-05 14:59:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925897183] [2021-06-05 14:59:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:17,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925897183] [2021-06-05 14:59:17,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925897183] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:17,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:17,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:59:17,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599014492] [2021-06-05 14:59:17,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:59:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:59:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:17,864 INFO L87 Difference]: Start difference. First operand 1005 states and 3886 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:17,894 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-06-05 14:59:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:59:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:59:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:17,903 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:59:17,903 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 14:59:17,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 14:59:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 14:59:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8418688230008984) internal successors, (4276), 1113 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-06-05 14:59:17,952 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-06-05 14:59:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:17,952 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-06-05 14:59:17,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-06-05 14:59:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:59:17,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:17,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:59:17,959 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2065937446, now seen corresponding path program 1 times [2021-06-05 14:59:17,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043956457] [2021-06-05 14:59:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:18,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043956457] [2021-06-05 14:59:18,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043956457] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:18,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:18,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:59:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371012387] [2021-06-05 14:59:18,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:59:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:59:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,002 INFO L87 Difference]: Start difference. First operand 1114 states and 4276 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,052 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-06-05 14:59:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:59:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 14:59:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,068 INFO L225 Difference]: With dead ends: 1550 [2021-06-05 14:59:18,069 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 14:59:18,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 14:59:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-06-05 14:59:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.6268560361523563) internal successors, (5618), 1549 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-06-05 14:59:18,132 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-06-05 14:59:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,132 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-06-05 14:59:18,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-06-05 14:59:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:59:18,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,139 INFO L521 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] [2021-06-05 14:59:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:59:18,140 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash -114728766, now seen corresponding path program 1 times [2021-06-05 14:59:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644053358] [2021-06-05 14:59:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:18,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644053358] [2021-06-05 14:59:18,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644053358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:18,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:18,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:59:18,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978479178] [2021-06-05 14:59:18,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:59:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:59:18,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:18,176 INFO L87 Difference]: Start difference. First operand 1550 states and 5618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,205 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-06-05 14:59:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:59:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:59:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,217 INFO L225 Difference]: With dead ends: 1705 [2021-06-05 14:59:18,217 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 14:59:18,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 14:59:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-06-05 14:59:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.6003521126760565) internal successors, (6135), 1704 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-06-05 14:59:18,268 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-06-05 14:59:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,269 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-06-05 14:59:18,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-06-05 14:59:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:59:18,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,273 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:59:18,274 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1356073541, now seen corresponding path program 1 times [2021-06-05 14:59:18,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209634180] [2021-06-05 14:59:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:18,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209634180] [2021-06-05 14:59:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209634180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:18,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:18,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:59:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892489847] [2021-06-05 14:59:18,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:59:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:59:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:18,313 INFO L87 Difference]: Start difference. First operand 1705 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,333 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-06-05 14:59:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:59:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-05 14:59:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,343 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 14:59:18,343 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 14:59:18,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:59:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 14:59:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-06-05 14:59:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5595829195630584) internal successors, (7169), 2014 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-06-05 14:59:18,403 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-06-05 14:59:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,403 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-06-05 14:59:18,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-06-05 14:59:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:59:18,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,410 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:59:18,410 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 230141437, now seen corresponding path program 1 times [2021-06-05 14:59:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931672072] [2021-06-05 14:59:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:18,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931672072] [2021-06-05 14:59:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931672072] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:18,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:18,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:59:18,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290508489] [2021-06-05 14:59:18,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:59:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:59:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,452 INFO L87 Difference]: Start difference. First operand 2015 states and 7169 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,486 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-06-05 14:59:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:59:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-05 14:59:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,498 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 14:59:18,498 INFO L226 Difference]: Without dead ends: 2747 [2021-06-05 14:59:18,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-06-05 14:59:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-06-05 14:59:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2746 states have (on average 3.3557902403495996) internal successors, (9215), 2746 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-06-05 14:59:18,584 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-06-05 14:59:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,585 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-06-05 14:59:18,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-06-05 14:59:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 14:59:18,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,590 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:59:18,590 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -76350981, now seen corresponding path program 1 times [2021-06-05 14:59:18,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588090669] [2021-06-05 14:59:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:59:18,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588090669] [2021-06-05 14:59:18,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588090669] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:59:18,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:59:18,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:59:18,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601869994] [2021-06-05 14:59:18,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:59:18,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:59:18,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,633 INFO L87 Difference]: Start difference. First operand 2747 states and 9215 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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) [2021-06-05 14:59:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,675 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-06-05 14:59:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:59:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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 43 [2021-06-05 14:59:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,688 INFO L225 Difference]: With dead ends: 3169 [2021-06-05 14:59:18,688 INFO L226 Difference]: Without dead ends: 3169 [2021-06-05 14:59:18,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:59:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-05 14:59:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-06-05 14:59:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.1928661616161618) internal successors, (10115), 3168 states have internal predecessors, (10115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-06-05 14:59:18,759 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-06-05 14:59:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,761 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-06-05 14:59:18,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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) [2021-06-05 14:59:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-06-05 14:59:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:18,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,769 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:59:18,769 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2047461749, now seen corresponding path program 1 times [2021-06-05 14:59:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988825285] [2021-06-05 14:59:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:18,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988825285] [2021-06-05 14:59:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988825285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126726402] [2021-06-05 14:59:18,878 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 [2021-06-05 14:59:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:19,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126726402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:19,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 14:59:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769877419] [2021-06-05 14:59:19,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:59:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:59:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:59:19,214 INFO L87 Difference]: Start difference. First operand 3169 states and 10115 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2021-06-05 14:59:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:19,264 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-06-05 14:59:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:59:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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 48 [2021-06-05 14:59:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:19,295 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 14:59:19,295 INFO L226 Difference]: Without dead ends: 5074 [2021-06-05 14:59:19,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:59:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-06-05 14:59:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-06-05 14:59:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 3.2426943005181346) internal successors, (15646), 4825 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-06-05 14:59:19,399 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-06-05 14:59:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:19,400 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-06-05 14:59:19,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 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) [2021-06-05 14:59:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-06-05 14:59:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:19,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:19,409 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:19,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 14:59:19,625 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash -999410955, now seen corresponding path program 2 times [2021-06-05 14:59:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:19,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738602321] [2021-06-05 14:59:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:19,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738602321] [2021-06-05 14:59:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738602321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699597810] [2021-06-05 14:59:19,687 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 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 [2021-06-05 14:59:19,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:19,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:19,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699597810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:19,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:19,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:59:19,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629368906] [2021-06-05 14:59:19,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:59:19,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:59:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:59:19,856 INFO L87 Difference]: Start difference. First operand 4826 states and 15646 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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) [2021-06-05 14:59:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:19,936 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-06-05 14:59:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:59:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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 48 [2021-06-05 14:59:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:19,951 INFO L225 Difference]: With dead ends: 6962 [2021-06-05 14:59:19,951 INFO L226 Difference]: Without dead ends: 6313 [2021-06-05 14:59:19,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:59:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-05 14:59:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-06-05 14:59:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 3.2323974082073432) internal successors, (14966), 4630 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-06-05 14:59:20,048 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-06-05 14:59:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:20,049 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-06-05 14:59:20,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 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) [2021-06-05 14:59:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-06-05 14:59:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:20,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:20,056 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:20,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:20,273 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2087115997, now seen corresponding path program 3 times [2021-06-05 14:59:20,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:20,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371038585] [2021-06-05 14:59:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:20,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371038585] [2021-06-05 14:59:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371038585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570081710] [2021-06-05 14:59:20,317 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 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 [2021-06-05 14:59:20,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:20,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:59:20,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570081710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:20,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:20,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 14:59:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061677863] [2021-06-05 14:59:20,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:59:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:59:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:59:20,426 INFO L87 Difference]: Start difference. First operand 4631 states and 14966 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-05 14:59:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:20,496 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-06-05 14:59:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:59:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 48 [2021-06-05 14:59:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:20,549 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 14:59:20,549 INFO L226 Difference]: Without dead ends: 7472 [2021-06-05 14:59:20,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:59:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-06-05 14:59:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-06-05 14:59:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 3.2722595398027727) internal successors, (22896), 6997 states have internal predecessors, (22896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-06-05 14:59:20,677 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-06-05 14:59:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:20,677 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-06-05 14:59:20,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-05 14:59:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-06-05 14:59:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:20,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:20,717 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:20,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 14:59:20,935 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:20,935 INFO L82 PathProgramCache]: Analyzing trace with hash 724420429, now seen corresponding path program 4 times [2021-06-05 14:59:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:20,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304528396] [2021-06-05 14:59:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:59:21,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:21,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304528396] [2021-06-05 14:59:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304528396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116801220] [2021-06-05 14:59:21,001 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:59:21,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:59:21,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116801220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:21,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:59:21,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839896156] [2021-06-05 14:59:21,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:59:21,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:59:21,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:21,135 INFO L87 Difference]: Start difference. First operand 6998 states and 22896 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:21,226 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-06-05 14:59:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:59:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:21,244 INFO L225 Difference]: With dead ends: 9603 [2021-06-05 14:59:21,245 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 14:59:21,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 14:59:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-06-05 14:59:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6643 states have (on average 3.2599729038085203) internal successors, (21656), 6643 states have internal predecessors, (21656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-06-05 14:59:21,403 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-06-05 14:59:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:21,403 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-06-05 14:59:21,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-06-05 14:59:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:21,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:21,415 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:21,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:21,629 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1312989021, now seen corresponding path program 5 times [2021-06-05 14:59:21,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:21,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348121106] [2021-06-05 14:59:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:59:21,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348121106] [2021-06-05 14:59:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348121106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156460132] [2021-06-05 14:59:21,682 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 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 [2021-06-05 14:59:21,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:21,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:59:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156460132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:21,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:21,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:59:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13137942] [2021-06-05 14:59:21,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:59:21,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:59:21,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:21,791 INFO L87 Difference]: Start difference. First operand 6644 states and 21656 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:21,866 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-06-05 14:59:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:59:21,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:21,883 INFO L225 Difference]: With dead ends: 8899 [2021-06-05 14:59:21,883 INFO L226 Difference]: Without dead ends: 8464 [2021-06-05 14:59:21,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-06-05 14:59:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-06-05 14:59:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 3.255171394799054) internal successors, (22031), 6768 states have internal predecessors, (22031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-06-05 14:59:22,078 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-06-05 14:59:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:22,079 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-06-05 14:59:22,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-06-05 14:59:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:22,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:22,091 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:22,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 14:59:22,305 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 823922659, now seen corresponding path program 6 times [2021-06-05 14:59:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83892523] [2021-06-05 14:59:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:22,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83892523] [2021-06-05 14:59:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83892523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940035112] [2021-06-05 14:59:22,353 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 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 [2021-06-05 14:59:22,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:22,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:22,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 14:59:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940035112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:22,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 14:59:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789479100] [2021-06-05 14:59:22,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:59:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:22,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:59:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:22,470 INFO L87 Difference]: Start difference. First operand 6769 states and 22031 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-05 14:59:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:22,593 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-06-05 14:59:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:59:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 48 [2021-06-05 14:59:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:22,615 INFO L225 Difference]: With dead ends: 11547 [2021-06-05 14:59:22,615 INFO L226 Difference]: Without dead ends: 11400 [2021-06-05 14:59:22,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:59:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-06-05 14:59:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-06-05 14:59:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 3.3118902733507194) internal successors, (34288), 10353 states have internal predecessors, (34288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-06-05 14:59:22,786 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-06-05 14:59:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:22,786 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-06-05 14:59:22,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-05 14:59:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-06-05 14:59:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:22,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:22,802 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:23,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:23,020 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 234489175, now seen corresponding path program 7 times [2021-06-05 14:59:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:23,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190689810] [2021-06-05 14:59:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:23,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:23,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190689810] [2021-06-05 14:59:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190689810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397392304] [2021-06-05 14:59:23,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:59:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:23,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397392304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917518748] [2021-06-05 14:59:23,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:23,274 INFO L87 Difference]: Start difference. First operand 10354 states and 34288 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:23,395 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-06-05 14:59:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:23,422 INFO L225 Difference]: With dead ends: 13296 [2021-06-05 14:59:23,422 INFO L226 Difference]: Without dead ends: 11854 [2021-06-05 14:59:23,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-06-05 14:59:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-06-05 14:59:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7019 states, 7018 states have (on average 3.2460815047021945) internal successors, (22781), 7018 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-06-05 14:59:23,594 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-06-05 14:59:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:23,594 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-06-05 14:59:23,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-06-05 14:59:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:23,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:23,608 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:23,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:59:23,831 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1877182247, now seen corresponding path program 8 times [2021-06-05 14:59:23,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:23,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729370334] [2021-06-05 14:59:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:23,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:23,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729370334] [2021-06-05 14:59:23,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729370334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822723574] [2021-06-05 14:59:23,884 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 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 [2021-06-05 14:59:23,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822723574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:24,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283215718] [2021-06-05 14:59:24,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:24,043 INFO L87 Difference]: Start difference. First operand 7019 states and 22781 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:24,169 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-06-05 14:59:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:24,187 INFO L225 Difference]: With dead ends: 10813 [2021-06-05 14:59:24,187 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 14:59:24,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 14:59:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-06-05 14:59:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 7526 states have (on average 3.233723093276641) internal successors, (24337), 7526 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-06-05 14:59:24,310 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-06-05 14:59:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:24,310 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-06-05 14:59:24,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-06-05 14:59:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:24,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:24,320 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:24,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:59:24,533 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1828351565, now seen corresponding path program 9 times [2021-06-05 14:59:24,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:24,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013231253] [2021-06-05 14:59:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:24,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013231253] [2021-06-05 14:59:24,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013231253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369344540] [2021-06-05 14:59:24,603 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:24,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:59:24,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:24,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369344540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:24,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186133193] [2021-06-05 14:59:24,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:24,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:24,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:24,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:24,703 INFO L87 Difference]: Start difference. First operand 7527 states and 24337 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:24,834 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-06-05 14:59:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:24,852 INFO L225 Difference]: With dead ends: 12429 [2021-06-05 14:59:24,852 INFO L226 Difference]: Without dead ends: 12276 [2021-06-05 14:59:24,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-06-05 14:59:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-06-05 14:59:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12112 states, 12111 states have (on average 3.2449838989348527) internal successors, (39300), 12111 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-06-05 14:59:25,021 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-06-05 14:59:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:25,021 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-06-05 14:59:25,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-06-05 14:59:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:25,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:25,037 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:25,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:59:25,252 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:25,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1647215527, now seen corresponding path program 10 times [2021-06-05 14:59:25,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:25,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703406971] [2021-06-05 14:59:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:25,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703406971] [2021-06-05 14:59:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703406971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437607359] [2021-06-05 14:59:25,313 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 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 [2021-06-05 14:59:25,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437607359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:25,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:25,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698746298] [2021-06-05 14:59:25,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:25,435 INFO L87 Difference]: Start difference. First operand 12112 states and 39300 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:25,566 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-06-05 14:59:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:25,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:25,655 INFO L225 Difference]: With dead ends: 21741 [2021-06-05 14:59:25,655 INFO L226 Difference]: Without dead ends: 19893 [2021-06-05 14:59:25,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-06-05 14:59:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-06-05 14:59:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18976 states, 18975 states have (on average 3.25965744400527) internal successors, (61852), 18975 states have internal predecessors, (61852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-06-05 14:59:26,007 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-06-05 14:59:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:26,007 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-06-05 14:59:26,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-06-05 14:59:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:26,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:26,032 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:26,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:59:26,237 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 420434765, now seen corresponding path program 11 times [2021-06-05 14:59:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:26,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379419537] [2021-06-05 14:59:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:26,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379419537] [2021-06-05 14:59:26,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379419537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609517521] [2021-06-05 14:59:26,291 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 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 [2021-06-05 14:59:26,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:59:26,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:26,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609517521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:26,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:26,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099559218] [2021-06-05 14:59:26,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:26,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:26,446 INFO L87 Difference]: Start difference. First operand 18976 states and 61852 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:26,643 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-06-05 14:59:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:26,700 INFO L225 Difference]: With dead ends: 34095 [2021-06-05 14:59:26,700 INFO L226 Difference]: Without dead ends: 30605 [2021-06-05 14:59:26,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-06-05 14:59:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-06-05 14:59:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29305 states, 29304 states have (on average 3.2807125307125307) internal successors, (96138), 29304 states have internal predecessors, (96138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-06-05 14:59:27,324 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-06-05 14:59:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:27,325 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-06-05 14:59:27,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-06-05 14:59:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 14:59:27,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:27,373 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:27,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:59:27,589 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1849079559, now seen corresponding path program 12 times [2021-06-05 14:59:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:27,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053861875] [2021-06-05 14:59:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:27,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053861875] [2021-06-05 14:59:27,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053861875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:27,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516186971] [2021-06-05 14:59:27,671 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 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 [2021-06-05 14:59:27,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:59:27,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:27,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516186971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:27,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:27,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 14:59:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525734891] [2021-06-05 14:59:27,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:59:27,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:59:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:27,771 INFO L87 Difference]: Start difference. First operand 29305 states and 96138 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:28,083 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-06-05 14:59:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:59:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 14:59:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:28,166 INFO L225 Difference]: With dead ends: 46568 [2021-06-05 14:59:28,166 INFO L226 Difference]: Without dead ends: 44858 [2021-06-05 14:59:28,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:59:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-06-05 14:59:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-06-05 14:59:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44258 states, 44257 states have (on average 3.277741374245882) internal successors, (145063), 44257 states have internal predecessors, (145063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-06-05 14:59:28,990 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-06-05 14:59:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:28,990 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-06-05 14:59:28,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-06-05 14:59:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 14:59:29,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:29,049 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:29,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:29,249 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1183199189, now seen corresponding path program 1 times [2021-06-05 14:59:29,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:29,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484590126] [2021-06-05 14:59:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:59:29,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484590126] [2021-06-05 14:59:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484590126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564469329] [2021-06-05 14:59:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 14:59:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:59:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:59:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564469329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:29,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:29,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 14:59:29,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32460826] [2021-06-05 14:59:29,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:59:29,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:59:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:29,611 INFO L87 Difference]: Start difference. First operand 44258 states and 145063 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:29,831 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-06-05 14:59:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:59:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 14:59:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:29,831 INFO L225 Difference]: With dead ends: 44256 [2021-06-05 14:59:29,831 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 14:59:29,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:59:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 14:59:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 14:59:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 14:59:29,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-06-05 14:59:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:29,832 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 14:59:29,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 14:59:29,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 14:59:30,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 14:59:30,034 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:59:30,035 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:59:30 BasicIcfg [2021-06-05 14:59:30,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:59:30,036 INFO L168 Benchmark]: Toolchain (without parser) took 12904.78 ms. Allocated memory was 390.1 MB in the beginning and 5.7 GB in the end (delta: 5.3 GB). Free memory was 369.0 MB in the beginning and 4.9 GB in the end (delta: -4.5 GB). Peak memory consumption was 743.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 390.1 MB. Free memory is still 370.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.07 ms. Allocated memory is still 390.1 MB. Free memory was 369.0 MB in the beginning and 367.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L168 Benchmark]: Boogie Preprocessor took 17.77 ms. Allocated memory is still 390.1 MB. Free memory was 367.5 MB in the beginning and 366.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L168 Benchmark]: RCFGBuilder took 225.59 ms. Allocated memory is still 390.1 MB. Free memory was 366.4 MB in the beginning and 353.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L168 Benchmark]: TraceAbstraction took 12636.99 ms. Allocated memory was 390.1 MB in the beginning and 5.7 GB in the end (delta: 5.3 GB). Free memory was 353.0 MB in the beginning and 4.9 GB in the end (delta: -4.5 GB). Peak memory consumption was 728.9 MB. Max. memory is 16.0 GB. [2021-06-05 14:59:30,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 390.1 MB. Free memory is still 370.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.07 ms. Allocated memory is still 390.1 MB. Free memory was 369.0 MB in the beginning and 367.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.77 ms. Allocated memory is still 390.1 MB. Free memory was 367.5 MB in the beginning and 366.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 225.59 ms. Allocated memory is still 390.1 MB. Free memory was 366.4 MB in the beginning and 353.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 12636.99 ms. Allocated memory was 390.1 MB in the beginning and 5.7 GB in the end (delta: 5.3 GB). Free memory was 353.0 MB in the beginning and 4.9 GB in the end (delta: -4.5 GB). Peak memory consumption was 728.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 100]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12566.8ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 326.7ms, AutomataDifference: 2534.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1335 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 790.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 640 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 467.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44258occurred in iteration=19, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3561.5ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.5ms SsaConstructionTime, 267.9ms SatisfiabilityAnalysisTime, 2394.9ms InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1451 ConstructedInterpolants, 0 QuantifiedInterpolants, 8762 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1054 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 7 PerfectInterpolantSequences, 101/557 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...