/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/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:23:13,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:23:13,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:23:13,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:23:13,377 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 [2021-05-22 02:23:13,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:23:13,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:23:13,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:23:13,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:23:13,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:23:13,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:23:13,401 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:23:13,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:23:13,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:23:13,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:23:13,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:23:13,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:23:13,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:23:13,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:23:13,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:23:13,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:23:13,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:13,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:23:13,405 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:23:13,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:23:13,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:23:13,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:23:13,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:23:13,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:23:13,668 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:23:13,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2021-05-22 02:23:13,669 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2021-05-22 02:23:13,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:23:13,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:23:13,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:13,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:23:13,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:23:13,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:23:13,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:23:13,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:23:13,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:23:13,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... [2021-05-22 02:23:13,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:23:13,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:23:13,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:23:13,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:23:13,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:23:13,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:23:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:23:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:23:13,938 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:23:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:23:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:23:13,938 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:23:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:23:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:23:13,939 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:23:14,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:23:14,131 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-22 02:23:14,133 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:14 BoogieIcfgContainer [2021-05-22 02:23:14,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:23:14,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:23:14,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:23:14,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:23:14,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:23:13" (1/2) ... [2021-05-22 02:23:14,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aae5833 and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:23:14, skipping insertion in model container [2021-05-22 02:23:14,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:23:14" (2/2) ... [2021-05-22 02:23:14,138 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2021-05-22 02:23:14,141 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:23:14,141 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:23:14,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:23:14,142 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:23:14,173 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:23:14,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:23:14,200 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:23:14,200 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:23:14,200 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:23:14,200 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:23:14,200 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:23:14,200 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:23:14,200 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:23:14,200 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:23:14,206 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-05-22 02:23:14,213 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 02:23:14,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,219 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,219 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash 942627414, now seen corresponding path program 1 times [2021-05-22 02:23:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898274243] [2021-05-22 02:23:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898274243] [2021-05-22 02:23:14,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898274243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656309430] [2021-05-22 02:23:14,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,405 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,471 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-05-22 02:23:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-05-22 02:23:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,479 INFO L225 Difference]: With dead ends: 52 [2021-05-22 02:23:14,479 INFO L226 Difference]: Without dead ends: 40 [2021-05-22 02:23:14,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-22 02:23:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-05-22 02:23:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-05-22 02:23:14,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-05-22 02:23:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,502 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-05-22 02:23:14,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-05-22 02:23:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 02:23:14,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:23:14,503 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 382081942, now seen corresponding path program 2 times [2021-05-22 02:23:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690706273] [2021-05-22 02:23:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690706273] [2021-05-22 02:23:14,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690706273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:23:14,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520205879] [2021-05-22 02:23:14,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:23:14,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:23:14,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:23:14,563 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,612 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2021-05-22 02:23:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:23:14,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-05-22 02:23:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,613 INFO L225 Difference]: With dead ends: 48 [2021-05-22 02:23:14,613 INFO L226 Difference]: Without dead ends: 39 [2021-05-22 02:23:14,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-22 02:23:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-05-22 02:23:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-05-22 02:23:14,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2021-05-22 02:23:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,618 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-05-22 02:23:14,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-05-22 02:23:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-22 02:23:14,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:23:14,619 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1385928133, now seen corresponding path program 1 times [2021-05-22 02:23:14,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566884292] [2021-05-22 02:23:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566884292] [2021-05-22 02:23:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566884292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:23:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440212451] [2021-05-22 02:23:14,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:23:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:23:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:23:14,635 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,639 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2021-05-22 02:23:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:23:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-05-22 02:23:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,640 INFO L225 Difference]: With dead ends: 28 [2021-05-22 02:23:14,640 INFO L226 Difference]: Without dead ends: 28 [2021-05-22 02:23:14,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:23:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-22 02:23:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-22 02:23:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-05-22 02:23:14,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-05-22 02:23:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,644 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-05-22 02:23:14,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-05-22 02:23:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:14,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:23:14,645 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 924188067, now seen corresponding path program 1 times [2021-05-22 02:23:14,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832004545] [2021-05-22 02:23:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832004545] [2021-05-22 02:23:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832004545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551186688] [2021-05-22 02:23:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:14,701 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,746 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2021-05-22 02:23:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:14,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,747 INFO L225 Difference]: With dead ends: 60 [2021-05-22 02:23:14,747 INFO L226 Difference]: Without dead ends: 53 [2021-05-22 02:23:14,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-22 02:23:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-05-22 02:23:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-05-22 02:23:14,752 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2021-05-22 02:23:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,752 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-05-22 02:23:14,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-05-22 02:23:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:14,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:23:14,753 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash -28486685, now seen corresponding path program 2 times [2021-05-22 02:23:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175286904] [2021-05-22 02:23:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175286904] [2021-05-22 02:23:14,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175286904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130318204] [2021-05-22 02:23:14,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:14,802 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,846 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2021-05-22 02:23:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:14,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,847 INFO L225 Difference]: With dead ends: 75 [2021-05-22 02:23:14,847 INFO L226 Difference]: Without dead ends: 68 [2021-05-22 02:23:14,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-22 02:23:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-05-22 02:23:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-05-22 02:23:14,852 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2021-05-22 02:23:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,853 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-05-22 02:23:14,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-05-22 02:23:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:14,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,854 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:23:14,854 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1663097951, now seen corresponding path program 3 times [2021-05-22 02:23:14,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115580050] [2021-05-22 02:23:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115580050] [2021-05-22 02:23:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115580050] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:14,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109073834] [2021-05-22 02:23:14,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:14,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:14,900 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,937 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-05-22 02:23:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,938 INFO L225 Difference]: With dead ends: 63 [2021-05-22 02:23:14,938 INFO L226 Difference]: Without dead ends: 56 [2021-05-22 02:23:14,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-22 02:23:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-05-22 02:23:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-05-22 02:23:14,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2021-05-22 02:23:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,941 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-05-22 02:23:14,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-05-22 02:23:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:14,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:23:14,942 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1716368849, now seen corresponding path program 4 times [2021-05-22 02:23:14,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621168326] [2021-05-22 02:23:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621168326] [2021-05-22 02:23:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621168326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:14,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:14,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891557359] [2021-05-22 02:23:14,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:14,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:14,983 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,021 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2021-05-22 02:23:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,022 INFO L225 Difference]: With dead ends: 81 [2021-05-22 02:23:15,022 INFO L226 Difference]: Without dead ends: 74 [2021-05-22 02:23:15,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-22 02:23:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-05-22 02:23:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-05-22 02:23:15,025 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-05-22 02:23:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,026 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-05-22 02:23:15,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-05-22 02:23:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:15,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:23:15,026 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -887013811, now seen corresponding path program 5 times [2021-05-22 02:23:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732896765] [2021-05-22 02:23:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732896765] [2021-05-22 02:23:15,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732896765] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:15,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590536580] [2021-05-22 02:23:15,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:15,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:15,066 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,107 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2021-05-22 02:23:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:15,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,108 INFO L225 Difference]: With dead ends: 83 [2021-05-22 02:23:15,108 INFO L226 Difference]: Without dead ends: 76 [2021-05-22 02:23:15,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-22 02:23:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-05-22 02:23:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-05-22 02:23:15,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2021-05-22 02:23:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,112 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-05-22 02:23:15,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-05-22 02:23:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:23:15,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:23:15,113 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1520341375, now seen corresponding path program 6 times [2021-05-22 02:23:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824515872] [2021-05-22 02:23:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824515872] [2021-05-22 02:23:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824515872] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:23:15,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902991672] [2021-05-22 02:23:15,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:15,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:15,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:15,151 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,191 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2021-05-22 02:23:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:23:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:23:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,192 INFO L225 Difference]: With dead ends: 68 [2021-05-22 02:23:15,192 INFO L226 Difference]: Without dead ends: 61 [2021-05-22 02:23:15,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:23:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-22 02:23:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-05-22 02:23:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2021-05-22 02:23:15,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2021-05-22 02:23:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,196 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2021-05-22 02:23:15,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2021-05-22 02:23:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:15,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:23:15,197 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2043306169, now seen corresponding path program 1 times [2021-05-22 02:23:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729614654] [2021-05-22 02:23:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729614654] [2021-05-22 02:23:15,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729614654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:15,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790386533] [2021-05-22 02:23:15,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:15,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:15,225 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,257 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-05-22 02:23:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,258 INFO L225 Difference]: With dead ends: 62 [2021-05-22 02:23:15,258 INFO L226 Difference]: Without dead ends: 54 [2021-05-22 02:23:15,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-22 02:23:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-05-22 02:23:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-05-22 02:23:15,261 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-05-22 02:23:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,261 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-05-22 02:23:15,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-05-22 02:23:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:15,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:23:15,262 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1561333194, now seen corresponding path program 1 times [2021-05-22 02:23:15,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813889299] [2021-05-22 02:23:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813889299] [2021-05-22 02:23:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813889299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563827415] [2021-05-22 02:23:15,287 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 [2021-05-22 02:23:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:23:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563827415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:15,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-22 02:23:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950487198] [2021-05-22 02:23:15,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:23:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:23:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:23:15,449 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,481 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2021-05-22 02:23:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 13 [2021-05-22 02:23:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,482 INFO L225 Difference]: With dead ends: 58 [2021-05-22 02:23:15,482 INFO L226 Difference]: Without dead ends: 58 [2021-05-22 02:23:15,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-22 02:23:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-05-22 02:23:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-05-22 02:23:15,490 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2021-05-22 02:23:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,490 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-05-22 02:23:15,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-05-22 02:23:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:15,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-22 02:23:15,710 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1719807367, now seen corresponding path program 2 times [2021-05-22 02:23:15,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080706200] [2021-05-22 02:23:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080706200] [2021-05-22 02:23:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080706200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:15,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:15,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253562865] [2021-05-22 02:23:15,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:15,749 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,792 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-05-22 02:23:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,793 INFO L225 Difference]: With dead ends: 79 [2021-05-22 02:23:15,793 INFO L226 Difference]: Without dead ends: 76 [2021-05-22 02:23:15,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-22 02:23:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-05-22 02:23:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-05-22 02:23:15,799 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-05-22 02:23:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,799 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-05-22 02:23:15,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-05-22 02:23:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:15,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:23:15,800 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1972962632, now seen corresponding path program 2 times [2021-05-22 02:23:15,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531726533] [2021-05-22 02:23:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531726533] [2021-05-22 02:23:15,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531726533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999626043] [2021-05-22 02:23:15,832 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) [2021-05-22 02:23:15,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:15,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:23:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999626043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:15,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:23:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588123889] [2021-05-22 02:23:15,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:15,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:15,926 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,954 INFO L93 Difference]: Finished difference Result 69 states and 128 transitions. [2021-05-22 02:23:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:23:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,956 INFO L225 Difference]: With dead ends: 69 [2021-05-22 02:23:15,956 INFO L226 Difference]: Without dead ends: 69 [2021-05-22 02:23:15,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-22 02:23:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-05-22 02:23:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-05-22 02:23:15,961 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-05-22 02:23:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,961 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-05-22 02:23:15,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-05-22 02:23:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:15,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-22 02:23:16,182 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1874666941, now seen corresponding path program 3 times [2021-05-22 02:23:16,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96967384] [2021-05-22 02:23:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96967384] [2021-05-22 02:23:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96967384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519489491] [2021-05-22 02:23:16,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,218 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,263 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-05-22 02:23:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,264 INFO L225 Difference]: With dead ends: 64 [2021-05-22 02:23:16,264 INFO L226 Difference]: Without dead ends: 64 [2021-05-22 02:23:16,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-22 02:23:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-05-22 02:23:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-05-22 02:23:16,268 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-05-22 02:23:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,268 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-05-22 02:23:16,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-05-22 02:23:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,269 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:23:16,269 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash -108130304, now seen corresponding path program 3 times [2021-05-22 02:23:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431884350] [2021-05-22 02:23:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431884350] [2021-05-22 02:23:16,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431884350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903754851] [2021-05-22 02:23:16,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,296 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,323 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2021-05-22 02:23:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,324 INFO L225 Difference]: With dead ends: 47 [2021-05-22 02:23:16,324 INFO L226 Difference]: Without dead ends: 45 [2021-05-22 02:23:16,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-22 02:23:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-05-22 02:23:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-05-22 02:23:16,329 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-05-22 02:23:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,329 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-05-22 02:23:16,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-05-22 02:23:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:23:16,329 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 831106635, now seen corresponding path program 4 times [2021-05-22 02:23:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485032249] [2021-05-22 02:23:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485032249] [2021-05-22 02:23:16,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485032249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783286068] [2021-05-22 02:23:16,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,348 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,375 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-05-22 02:23:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,376 INFO L225 Difference]: With dead ends: 62 [2021-05-22 02:23:16,376 INFO L226 Difference]: Without dead ends: 59 [2021-05-22 02:23:16,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-22 02:23:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-05-22 02:23:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-05-22 02:23:16,377 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-05-22 02:23:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,377 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-05-22 02:23:16,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-05-22 02:23:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,378 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:23:16,378 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 577951370, now seen corresponding path program 4 times [2021-05-22 02:23:16,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341170197] [2021-05-22 02:23:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341170197] [2021-05-22 02:23:16,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341170197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:16,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479184781] [2021-05-22 02:23:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:16,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-22 02:23:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479184781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:16,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:16,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-22 02:23:16,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903927626] [2021-05-22 02:23:16,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:23:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:23:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,459 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,487 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-05-22 02:23:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:23:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,488 INFO L225 Difference]: With dead ends: 63 [2021-05-22 02:23:16,488 INFO L226 Difference]: Without dead ends: 63 [2021-05-22 02:23:16,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:23:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-22 02:23:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-05-22 02:23:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-05-22 02:23:16,489 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-05-22 02:23:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,489 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-05-22 02:23:16,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-05-22 02:23:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:23:16,706 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,706 INFO L82 PathProgramCache]: Analyzing trace with hash 130613647, now seen corresponding path program 5 times [2021-05-22 02:23:16,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759021825] [2021-05-22 02:23:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759021825] [2021-05-22 02:23:16,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759021825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013097441] [2021-05-22 02:23:16,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,730 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,765 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-05-22 02:23:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,766 INFO L225 Difference]: With dead ends: 62 [2021-05-22 02:23:16,766 INFO L226 Difference]: Without dead ends: 62 [2021-05-22 02:23:16,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-22 02:23:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-05-22 02:23:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-05-22 02:23:16,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-05-22 02:23:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,771 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-05-22 02:23:16,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-05-22 02:23:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:23:16,772 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1852183598, now seen corresponding path program 5 times [2021-05-22 02:23:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205972250] [2021-05-22 02:23:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205972250] [2021-05-22 02:23:16,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205972250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256009179] [2021-05-22 02:23:16,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,804 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,832 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-05-22 02:23:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,833 INFO L225 Difference]: With dead ends: 65 [2021-05-22 02:23:16,833 INFO L226 Difference]: Without dead ends: 63 [2021-05-22 02:23:16,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-22 02:23:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-05-22 02:23:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-05-22 02:23:16,834 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-05-22 02:23:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,834 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-05-22 02:23:16,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-05-22 02:23:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,835 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:23:16,835 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash 133239423, now seen corresponding path program 6 times [2021-05-22 02:23:16,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166993253] [2021-05-22 02:23:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166993253] [2021-05-22 02:23:16,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166993253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211481968] [2021-05-22 02:23:16,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,885 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,913 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-05-22 02:23:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,913 INFO L225 Difference]: With dead ends: 60 [2021-05-22 02:23:16,913 INFO L226 Difference]: Without dead ends: 60 [2021-05-22 02:23:16,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-22 02:23:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-05-22 02:23:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-05-22 02:23:16,915 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-05-22 02:23:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-05-22 02:23:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-05-22 02:23:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:23:16,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:23:16,915 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash -238616864, now seen corresponding path program 6 times [2021-05-22 02:23:16,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715597948] [2021-05-22 02:23:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:16,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:16,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715597948] [2021-05-22 02:23:16,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715597948] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:23:16,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:23:16,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:23:16,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709265881] [2021-05-22 02:23:16,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:23:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:23:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:23:16,936 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:16,960 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-05-22 02:23:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:23:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:23:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:16,961 INFO L225 Difference]: With dead ends: 43 [2021-05-22 02:23:16,961 INFO L226 Difference]: Without dead ends: 39 [2021-05-22 02:23:16,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:23:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-22 02:23:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-22 02:23:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-05-22 02:23:16,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-05-22 02:23:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:16,962 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-05-22 02:23:16,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-05-22 02:23:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:23:16,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:16,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:16,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:23:16,963 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 319968626, now seen corresponding path program 1 times [2021-05-22 02:23:16,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:16,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389259431] [2021-05-22 02:23:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389259431] [2021-05-22 02:23:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389259431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853964149] [2021-05-22 02:23:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:23:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:17,224 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:23:17,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:17,426 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:23:17,428 INFO L168 Benchmark]: Toolchain (without parser) took 3614.92 ms. Allocated memory is still 362.8 MB. Free memory was 342.8 MB in the beginning and 311.7 MB in the end (delta: 31.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 344.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.63 ms. Allocated memory is still 362.8 MB. Free memory was 342.7 MB in the beginning and 341.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L168 Benchmark]: Boogie Preprocessor took 26.63 ms. Allocated memory is still 362.8 MB. Free memory was 341.2 MB in the beginning and 340.3 MB in the end (delta: 907.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L168 Benchmark]: RCFGBuilder took 265.26 ms. Allocated memory is still 362.8 MB. Free memory was 340.1 MB in the beginning and 321.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L168 Benchmark]: TraceAbstraction took 3293.41 ms. Allocated memory is still 362.8 MB. Free memory was 321.0 MB in the beginning and 311.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:17,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 344.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.63 ms. Allocated memory is still 362.8 MB. Free memory was 342.7 MB in the beginning and 341.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.63 ms. Allocated memory is still 362.8 MB. Free memory was 341.2 MB in the beginning and 340.3 MB in the end (delta: 907.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 265.26 ms. Allocated memory is still 362.8 MB. Free memory was 340.1 MB in the beginning and 321.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3293.41 ms. Allocated memory is still 362.8 MB. Free memory was 321.0 MB in the beginning and 311.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...