/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:16:50,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:16:50,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:16:50,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:16:50,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:16:50,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:16:50,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:16:50,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:16:50,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:16:50,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:16:50,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:16:50,902 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:16:50,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:16:50,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:16:50,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:16:50,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:16:50,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:16:50,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:16:50,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:16:50,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:16:50,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:16:50,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:16:50,907 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:16:50,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:16:50,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:16:51,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:16:51,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:16:51,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:16:51,234 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:16:51,235 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:16:51,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-06-05 21:16:51,236 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-06-05 21:16:51,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:16:51,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:16:51,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:16:51,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:16:51,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:16:51,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:16:51,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:16:51,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:16:51,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:16:51,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... [2021-06-05 21:16:51,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:16:51,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:16:51,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:16:51,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:16:51,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:16:51,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:16:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:16:51,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:16:51,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:16:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:16:51,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:16:51,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:16:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:16:51,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:16:51,402 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:16:51,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:16:51,582 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:16:51,584 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:16:51 BoogieIcfgContainer [2021-06-05 21:16:51,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:16:51,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:16:51,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:16:51,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:16:51,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:16:51" (1/2) ... [2021-06-05 21:16:51,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf49529 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:16:51, skipping insertion in model container [2021-06-05 21:16:51,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:16:51" (2/2) ... [2021-06-05 21:16:51,592 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-06-05 21:16:51,601 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:16:51,601 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:16:51,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:16:51,603 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:16:51,673 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:16:51,690 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:16:51,714 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:16:51,714 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:16:51,715 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:16:51,715 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:16:51,715 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:16:51,715 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:16:51,715 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:16:51,715 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:16:51,738 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-06-05 21:16:51,756 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:16:51,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:51,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:51,765 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1314794576, now seen corresponding path program 1 times [2021-06-05 21:16:51,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:51,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224918193] [2021-06-05 21:16:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:51,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224918193] [2021-06-05 21:16:51,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224918193] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:51,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:51,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:16:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510358590] [2021-06-05 21:16:51,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:16:51,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:16:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:16:51,926 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:51,968 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-06-05 21:16:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:16:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-06-05 21:16:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:51,984 INFO L225 Difference]: With dead ends: 131 [2021-06-05 21:16:51,985 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:16:51,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:16:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:16:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-06-05 21:16:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 21:16:52,041 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-06-05 21:16:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,042 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 21:16:52,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 21:16:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:16:52,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,045 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:16:52,046 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash 220857976, now seen corresponding path program 1 times [2021-06-05 21:16:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433607871] [2021-06-05 21:16:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433607871] [2021-06-05 21:16:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433607871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:52,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:16:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526211433] [2021-06-05 21:16:52,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:16:52,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:16:52,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:16:52,096 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,115 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-06-05 21:16:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:16:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-06-05 21:16:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,117 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:16:52,118 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:16:52,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:16:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:16:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-06-05 21:16:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-06-05 21:16:52,133 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-06-05 21:16:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,133 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-06-05 21:16:52,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-06-05 21:16:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:52,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,134 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:16:52,134 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1024512365, now seen corresponding path program 1 times [2021-06-05 21:16:52,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037639380] [2021-06-05 21:16:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037639380] [2021-06-05 21:16:52,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037639380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:52,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:52,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274745394] [2021-06-05 21:16:52,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:52,257 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,346 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-06-05 21:16:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,348 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:16:52,348 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:16:52,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:16:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-06-05 21:16:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-06-05 21:16:52,370 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-06-05 21:16:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,371 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-06-05 21:16:52,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-06-05 21:16:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:52,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,372 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:16:52,372 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1634430802, now seen corresponding path program 1 times [2021-06-05 21:16:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651700609] [2021-06-05 21:16:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651700609] [2021-06-05 21:16:52,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651700609] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:52,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:52,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:52,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185691834] [2021-06-05 21:16:52,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:52,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:52,474 INFO L87 Difference]: Start difference. First operand 118 states and 252 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) [2021-06-05 21:16:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,605 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-06-05 21:16:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:52,606 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 18 [2021-06-05 21:16:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,607 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:16:52,607 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:16:52,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:16:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:16:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-06-05 21:16:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-06-05 21:16:52,618 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-06-05 21:16:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,618 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-06-05 21:16:52,618 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) [2021-06-05 21:16:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-06-05 21:16:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:52,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,620 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:16:52,621 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash 123697834, now seen corresponding path program 2 times [2021-06-05 21:16:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102679199] [2021-06-05 21:16:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102679199] [2021-06-05 21:16:52,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102679199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:52,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:52,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:52,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52404329] [2021-06-05 21:16:52,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:52,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:52,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:52,730 INFO L87 Difference]: Start difference. First operand 113 states and 242 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) [2021-06-05 21:16:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,832 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-06-05 21:16:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:52,832 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 18 [2021-06-05 21:16:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,834 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:16:52,834 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:16:52,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:16:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-06-05 21:16:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 21:16:52,838 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-06-05 21:16:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,839 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 21:16:52,839 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) [2021-06-05 21:16:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 21:16:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:52,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:16:52,844 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1040617061, now seen corresponding path program 2 times [2021-06-05 21:16:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128675464] [2021-06-05 21:16:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:52,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:52,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128675464] [2021-06-05 21:16:52,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128675464] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:52,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:52,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:52,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003755510] [2021-06-05 21:16:52,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:52,906 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,974 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-06-05 21:16:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,975 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:16:52,975 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:16:52,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:16:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-06-05 21:16:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-06-05 21:16:52,980 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-06-05 21:16:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:52,981 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-06-05 21:16:52,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-06-05 21:16:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:52,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:52,982 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:52,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:16:52,982 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash -147253063, now seen corresponding path program 3 times [2021-06-05 21:16:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:52,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000393812] [2021-06-05 21:16:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000393812] [2021-06-05 21:16:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000393812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789377405] [2021-06-05 21:16:53,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:53,031 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:53,098 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-06-05 21:16:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:53,100 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:16:53,100 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:16:53,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:16:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-06-05 21:16:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-06-05 21:16:53,105 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-06-05 21:16:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,105 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-06-05 21:16:53,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-06-05 21:16:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:53,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,106 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:53,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:16:53,106 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash -546569092, now seen corresponding path program 3 times [2021-06-05 21:16:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:53,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795702612] [2021-06-05 21:16:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795702612] [2021-06-05 21:16:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795702612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249792537] [2021-06-05 21:16:53,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:53,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:53,213 INFO L87 Difference]: Start difference. First operand 123 states and 268 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) [2021-06-05 21:16:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:53,342 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-06-05 21:16:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:16:53,343 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 18 [2021-06-05 21:16:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:53,344 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:16:53,344 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:16:53,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:16:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-06-05 21:16:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-06-05 21:16:53,349 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-06-05 21:16:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,349 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-06-05 21:16:53,349 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) [2021-06-05 21:16:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-06-05 21:16:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:53,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,350 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:53,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 21:16:53,350 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash 346794906, now seen corresponding path program 4 times [2021-06-05 21:16:53,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:53,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928726652] [2021-06-05 21:16:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928726652] [2021-06-05 21:16:53,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928726652] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592421920] [2021-06-05 21:16:53,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:53,406 INFO L87 Difference]: Start difference. First operand 125 states and 272 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) [2021-06-05 21:16:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:53,542 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-06-05 21:16:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:16:53,543 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 18 [2021-06-05 21:16:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:53,544 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:16:53,544 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:16:53,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:16:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-06-05 21:16:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-06-05 21:16:53,550 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-06-05 21:16:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,550 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-06-05 21:16:53,551 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) [2021-06-05 21:16:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-06-05 21:16:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:53,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,551 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:53,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 21:16:53,552 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-06-05 21:16:53,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:53,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595571283] [2021-06-05 21:16:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595571283] [2021-06-05 21:16:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595571283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582320040] [2021-06-05 21:16:53,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:53,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:53,610 INFO L87 Difference]: Start difference. First operand 110 states and 238 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) [2021-06-05 21:16:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:53,708 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-06-05 21:16:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:53,708 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 18 [2021-06-05 21:16:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:53,709 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:16:53,709 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:16:53,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:16:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-06-05 21:16:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 21:16:53,713 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-06-05 21:16:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,713 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 21:16:53,713 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) [2021-06-05 21:16:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 21:16:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:53,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,714 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:53,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 21:16:53,714 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-06-05 21:16:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:53,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355358676] [2021-06-05 21:16:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355358676] [2021-06-05 21:16:53,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355358676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:53,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700124407] [2021-06-05 21:16:53,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:53,767 INFO L87 Difference]: Start difference. First operand 110 states and 233 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) [2021-06-05 21:16:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:53,871 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-06-05 21:16:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:53,872 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 18 [2021-06-05 21:16:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:53,872 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:16:53,872 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:16:53,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:16:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-06-05 21:16:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-06-05 21:16:53,876 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-06-05 21:16:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,876 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-06-05 21:16:53,876 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) [2021-06-05 21:16:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-06-05 21:16:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:53,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,877 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:53,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 21:16:53,877 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:53,878 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-06-05 21:16:53,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:53,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271304528] [2021-06-05 21:16:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:53,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271304528] [2021-06-05 21:16:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271304528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:53,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:53,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962578624] [2021-06-05 21:16:53,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:53,926 INFO L87 Difference]: Start difference. First operand 112 states and 237 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) [2021-06-05 21:16:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,048 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-06-05 21:16:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:54,049 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 18 [2021-06-05 21:16:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,050 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:16:54,050 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:16:54,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:16:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-06-05 21:16:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-06-05 21:16:54,054 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-06-05 21:16:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,054 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-06-05 21:16:54,054 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) [2021-06-05 21:16:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-06-05 21:16:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,056 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 21:16:54,056 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-06-05 21:16:54,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813605319] [2021-06-05 21:16:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813605319] [2021-06-05 21:16:54,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813605319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040823140] [2021-06-05 21:16:54,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:54,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:54,111 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,187 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-06-05 21:16:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,188 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:16:54,188 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:16:54,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:16:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-06-05 21:16:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 21:16:54,198 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-06-05 21:16:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,199 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 21:16:54,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 21:16:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,201 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 21:16:54,202 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-06-05 21:16:54,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687270960] [2021-06-05 21:16:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687270960] [2021-06-05 21:16:54,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687270960] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:54,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311656725] [2021-06-05 21:16:54,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:54,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:54,269 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,337 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-06-05 21:16:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,339 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:16:54,339 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:16:54,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:16:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-06-05 21:16:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 21:16:54,343 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-06-05 21:16:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,344 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 21:16:54,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 21:16:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,344 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 21:16:54,345 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-06-05 21:16:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115441102] [2021-06-05 21:16:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115441102] [2021-06-05 21:16:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115441102] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:16:54,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133409539] [2021-06-05 21:16:54,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:16:54,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:16:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:16:54,404 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,480 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-06-05 21:16:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:16:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,481 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:16:54,481 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:16:54,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:16:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:16:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-06-05 21:16:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-06-05 21:16:54,485 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-06-05 21:16:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,485 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-06-05 21:16:54,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-06-05 21:16:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-06-05 21:16:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,486 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 21:16:54,486 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-06-05 21:16:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057364174] [2021-06-05 21:16:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057364174] [2021-06-05 21:16:54,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057364174] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799252875] [2021-06-05 21:16:54,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:54,537 INFO L87 Difference]: Start difference. First operand 105 states and 217 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) [2021-06-05 21:16:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,624 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-06-05 21:16:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:54,625 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 18 [2021-06-05 21:16:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,626 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:16:54,626 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:16:54,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:16:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-06-05 21:16:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-06-05 21:16:54,628 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-06-05 21:16:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-06-05 21:16:54,628 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) [2021-06-05 21:16:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-06-05 21:16:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 21:16:54,629 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-06-05 21:16:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561887383] [2021-06-05 21:16:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561887383] [2021-06-05 21:16:54,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561887383] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:54,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765724846] [2021-06-05 21:16:54,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:54,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:54,678 INFO L87 Difference]: Start difference. First operand 99 states and 206 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) [2021-06-05 21:16:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,779 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-06-05 21:16:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:54,779 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 18 [2021-06-05 21:16:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,780 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:16:54,780 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:16:54,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:16:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-06-05 21:16:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-06-05 21:16:54,784 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-06-05 21:16:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,784 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-06-05 21:16:54,784 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) [2021-06-05 21:16:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-06-05 21:16:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,784 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 21:16:54,785 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-06-05 21:16:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797764931] [2021-06-05 21:16:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797764931] [2021-06-05 21:16:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797764931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247331103] [2021-06-05 21:16:54,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:54,830 INFO L87 Difference]: Start difference. First operand 98 states and 202 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) [2021-06-05 21:16:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,930 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-06-05 21:16:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:54,930 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 18 [2021-06-05 21:16:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,931 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:16:54,931 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:16:54,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:16:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-06-05 21:16:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-06-05 21:16:54,934 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-06-05 21:16:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:54,934 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-06-05 21:16:54,934 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) [2021-06-05 21:16:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-06-05 21:16:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:54,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:54,935 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 21:16:54,935 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-06-05 21:16:54,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584290273] [2021-06-05 21:16:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:54,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584290273] [2021-06-05 21:16:54,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584290273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:54,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:54,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658058849] [2021-06-05 21:16:54,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:54,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:54,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:54,987 INFO L87 Difference]: Start difference. First operand 93 states and 191 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) [2021-06-05 21:16:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:55,074 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-06-05 21:16:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:55,074 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 18 [2021-06-05 21:16:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,075 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:16:55,075 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:16:55,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:16:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-06-05 21:16:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-06-05 21:16:55,077 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-06-05 21:16:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-06-05 21:16:55,078 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) [2021-06-05 21:16:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-06-05 21:16:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:55,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,078 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:55,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 21:16:55,078 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-06-05 21:16:55,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:55,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581849847] [2021-06-05 21:16:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:55,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:55,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581849847] [2021-06-05 21:16:55,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581849847] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:55,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:55,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:55,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298163865] [2021-06-05 21:16:55,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:55,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:55,136 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:55,272 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-06-05 21:16:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:16:55,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,274 INFO L225 Difference]: With dead ends: 147 [2021-06-05 21:16:55,274 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:16:55,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:16:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-06-05 21:16:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-06-05 21:16:55,279 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-06-05 21:16:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,279 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-06-05 21:16:55,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-06-05 21:16:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:55,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:55,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 21:16:55,280 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-06-05 21:16:55,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:55,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961377646] [2021-06-05 21:16:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:55,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:55,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961377646] [2021-06-05 21:16:55,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961377646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:55,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:55,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:55,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013520913] [2021-06-05 21:16:55,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:55,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:55,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:55,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:55,362 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:55,496 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-06-05 21:16:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,497 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:16:55,497 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:16:55,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:16:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-06-05 21:16:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 21:16:55,501 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-06-05 21:16:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,502 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 21:16:55,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 21:16:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:55,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,502 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:55,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 21:16:55,503 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-06-05 21:16:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:55,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714108362] [2021-06-05 21:16:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:55,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:55,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714108362] [2021-06-05 21:16:55,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714108362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:55,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:55,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101747943] [2021-06-05 21:16:55,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:55,551 INFO L87 Difference]: Start difference. First operand 110 states and 226 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) [2021-06-05 21:16:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:55,642 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-06-05 21:16:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:55,643 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 18 [2021-06-05 21:16:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,644 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:16:55,644 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:16:55,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:16:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-06-05 21:16:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-06-05 21:16:55,648 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-06-05 21:16:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,648 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-06-05 21:16:55,648 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) [2021-06-05 21:16:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-06-05 21:16:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:55,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,649 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:55,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 21:16:55,649 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-06-05 21:16:55,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:55,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257778586] [2021-06-05 21:16:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:55,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:55,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257778586] [2021-06-05 21:16:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257778586] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:55,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:55,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:55,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558255972] [2021-06-05 21:16:55,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:55,704 INFO L87 Difference]: Start difference. First operand 120 states and 248 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) [2021-06-05 21:16:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:55,795 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-06-05 21:16:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:55,795 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 18 [2021-06-05 21:16:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:55,796 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:16:55,796 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:16:55,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:16:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-06-05 21:16:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-06-05 21:16:55,800 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-06-05 21:16:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,800 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-06-05 21:16:55,800 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) [2021-06-05 21:16:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-06-05 21:16:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:55,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,801 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:55,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 21:16:55,801 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:55,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-06-05 21:16:55,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:55,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984213330] [2021-06-05 21:16:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:55,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:55,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984213330] [2021-06-05 21:16:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984213330] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:55,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:55,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193483691] [2021-06-05 21:16:55,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:55,865 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,004 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-06-05 21:16:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:16:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,005 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:16:56,005 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:16:56,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:16:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-06-05 21:16:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 21:16:56,009 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-06-05 21:16:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,009 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 21:16:56,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 21:16:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,010 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 21:16:56,010 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-06-05 21:16:56,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400223740] [2021-06-05 21:16:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400223740] [2021-06-05 21:16:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400223740] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:56,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:56,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:56,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560606424] [2021-06-05 21:16:56,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:56,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:56,068 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,241 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-06-05 21:16:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:16:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,242 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:16:56,242 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:16:56,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:16:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:16:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-06-05 21:16:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-06-05 21:16:56,252 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-06-05 21:16:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,252 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-06-05 21:16:56,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-06-05 21:16:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,253 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 21:16:56,254 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,254 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-06-05 21:16:56,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69133538] [2021-06-05 21:16:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69133538] [2021-06-05 21:16:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69133538] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682006818] [2021-06-05 21:16:56,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:56,316 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,435 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-06-05 21:16:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,436 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:16:56,436 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:16:56,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:16:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-06-05 21:16:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-06-05 21:16:56,440 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-06-05 21:16:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,440 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-06-05 21:16:56,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-06-05 21:16:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,441 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 21:16:56,441 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-06-05 21:16:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367851811] [2021-06-05 21:16:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367851811] [2021-06-05 21:16:56,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367851811] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:56,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:56,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034479667] [2021-06-05 21:16:56,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:56,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:56,501 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,623 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-06-05 21:16:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,624 INFO L225 Difference]: With dead ends: 195 [2021-06-05 21:16:56,625 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:16:56,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:16:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-06-05 21:16:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-06-05 21:16:56,629 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-06-05 21:16:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,629 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-06-05 21:16:56,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-06-05 21:16:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 21:16:56,630 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-06-05 21:16:56,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145783235] [2021-06-05 21:16:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145783235] [2021-06-05 21:16:56,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145783235] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:56,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:56,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:56,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34658478] [2021-06-05 21:16:56,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:56,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:56,695 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,822 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-06-05 21:16:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,823 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:16:56,823 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 21:16:56,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 21:16:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-06-05 21:16:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-06-05 21:16:56,827 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-06-05 21:16:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,828 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-06-05 21:16:56,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-06-05 21:16:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,828 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 21:16:56,828 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-06-05 21:16:56,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889298653] [2021-06-05 21:16:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889298653] [2021-06-05 21:16:56,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889298653] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:56,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:56,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248092029] [2021-06-05 21:16:56,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:56,895 INFO L87 Difference]: Start difference. First operand 116 states and 241 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) [2021-06-05 21:16:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:56,991 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-06-05 21:16:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:56,991 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 18 [2021-06-05 21:16:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:56,993 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:16:56,993 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:16:56,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:16:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-06-05 21:16:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-06-05 21:16:56,998 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-06-05 21:16:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:56,998 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-06-05 21:16:56,998 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) [2021-06-05 21:16:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-06-05 21:16:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:56,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:56,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 21:16:56,999 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-06-05 21:16:56,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973955121] [2021-06-05 21:16:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:57,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973955121] [2021-06-05 21:16:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973955121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513275570] [2021-06-05 21:16:57,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:57,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:57,044 INFO L87 Difference]: Start difference. First operand 124 states and 259 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) [2021-06-05 21:16:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,129 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-06-05 21:16:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:57,129 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 18 [2021-06-05 21:16:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,130 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:16:57,130 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:16:57,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:16:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-05 21:16:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-06-05 21:16:57,134 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-06-05 21:16:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-06-05 21:16:57,134 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) [2021-06-05 21:16:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-06-05 21:16:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:57,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:57,135 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:57,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 21:16:57,135 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-06-05 21:16:57,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:57,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230985205] [2021-06-05 21:16:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:57,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:57,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230985205] [2021-06-05 21:16:57,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230985205] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:57,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:57,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886484222] [2021-06-05 21:16:57,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:57,178 INFO L87 Difference]: Start difference. First operand 126 states and 263 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) [2021-06-05 21:16:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,266 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-06-05 21:16:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:57,266 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 18 [2021-06-05 21:16:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,267 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:16:57,267 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:16:57,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:16:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-06-05 21:16:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-06-05 21:16:57,270 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-06-05 21:16:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,270 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-06-05 21:16:57,270 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) [2021-06-05 21:16:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-06-05 21:16:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:57,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:57,271 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:57,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 21:16:57,271 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-06-05 21:16:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:57,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223704194] [2021-06-05 21:16:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:57,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223704194] [2021-06-05 21:16:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223704194] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:57,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:57,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:57,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189628630] [2021-06-05 21:16:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:57,324 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,480 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-06-05 21:16:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:16:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,482 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:16:57,482 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:16:57,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:16:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 21:16:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-06-05 21:16:57,487 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-06-05 21:16:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,487 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-06-05 21:16:57,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-06-05 21:16:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:57,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:57,488 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 21:16:57,488 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-06-05 21:16:57,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:57,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989365791] [2021-06-05 21:16:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:57,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:57,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989365791] [2021-06-05 21:16:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989365791] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380334732] [2021-06-05 21:16:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:57,554 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,703 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-06-05 21:16:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:16:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,704 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:16:57,704 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:16:57,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:16:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:16:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-06-05 21:16:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-06-05 21:16:57,708 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-06-05 21:16:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,708 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-06-05 21:16:57,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-06-05 21:16:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:57,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:57,708 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:57,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 21:16:57,708 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-06-05 21:16:57,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:57,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232672231] [2021-06-05 21:16:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:57,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:57,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232672231] [2021-06-05 21:16:57,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232672231] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:57,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:57,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:57,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371006435] [2021-06-05 21:16:57,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:57,772 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,934 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-06-05 21:16:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:16:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,935 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:16:57,935 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:16:57,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:16:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-06-05 21:16:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-06-05 21:16:57,951 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-06-05 21:16:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:57,951 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-06-05 21:16:57,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-06-05 21:16:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:57,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:57,952 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:57,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 21:16:57,952 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-06-05 21:16:57,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:57,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740809505] [2021-06-05 21:16:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740809505] [2021-06-05 21:16:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740809505] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562550289] [2021-06-05 21:16:58,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,008 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,115 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-06-05 21:16:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,116 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:16:58,116 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 21:16:58,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 21:16:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-06-05 21:16:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-06-05 21:16:58,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-06-05 21:16:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,118 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-06-05 21:16:58,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-06-05 21:16:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,119 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 21:16:58,119 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-06-05 21:16:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106985615] [2021-06-05 21:16:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106985615] [2021-06-05 21:16:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106985615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595322365] [2021-06-05 21:16:58,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,172 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,285 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-06-05 21:16:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,286 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:16:58,286 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:16:58,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:16:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-06-05 21:16:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 21:16:58,288 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 21:16:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,289 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 21:16:58,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 21:16:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 21:16:58,289 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-06-05 21:16:58,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179014087] [2021-06-05 21:16:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179014087] [2021-06-05 21:16:58,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179014087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939617605] [2021-06-05 21:16:58,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,346 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,475 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 21:16:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,476 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:16:58,476 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 21:16:58,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 21:16:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-06-05 21:16:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-06-05 21:16:58,477 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-06-05 21:16:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,478 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-06-05 21:16:58,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-06-05 21:16:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,478 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 21:16:58,478 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-06-05 21:16:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493881110] [2021-06-05 21:16:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493881110] [2021-06-05 21:16:58,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493881110] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386881142] [2021-06-05 21:16:58,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,534 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,657 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-06-05 21:16:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,658 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:16:58,658 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:16:58,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:16:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-06-05 21:16:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-06-05 21:16:58,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-06-05 21:16:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,661 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-06-05 21:16:58,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-06-05 21:16:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,662 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 21:16:58,662 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-06-05 21:16:58,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824549319] [2021-06-05 21:16:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824549319] [2021-06-05 21:16:58,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824549319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696803820] [2021-06-05 21:16:58,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,721 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,833 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-06-05 21:16:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,834 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:16:58,834 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:16:58,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:16:58,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-06-05 21:16:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-06-05 21:16:58,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-06-05 21:16:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,836 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-06-05 21:16:58,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-06-05 21:16:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 21:16:58,836 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-06-05 21:16:58,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119066627] [2021-06-05 21:16:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119066627] [2021-06-05 21:16:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119066627] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613123549] [2021-06-05 21:16:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:58,890 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:58,995 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-06-05 21:16:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:58,996 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:16:58,996 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 21:16:58,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 21:16:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-06-05 21:16:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 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) [2021-06-05 21:16:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-06-05 21:16:58,997 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-06-05 21:16:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,998 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-06-05 21:16:58,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-06-05 21:16:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:58,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 21:16:58,998 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 7 times [2021-06-05 21:16:58,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737081542] [2021-06-05 21:16:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737081542] [2021-06-05 21:16:59,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737081542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:59,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056871185] [2021-06-05 21:16:59,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:59,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:59,048 INFO L87 Difference]: Start difference. First operand 46 states and 75 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) [2021-06-05 21:16:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,121 INFO L93 Difference]: Finished difference Result 109 states and 168 transitions. [2021-06-05 21:16:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:59,121 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 18 [2021-06-05 21:16:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,121 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:16:59,121 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:16:59,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:16:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-06-05 21:16:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2021-06-05 21:16:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2021-06-05 21:16:59,124 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 18 [2021-06-05 21:16:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,124 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2021-06-05 21:16:59,124 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) [2021-06-05 21:16:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2021-06-05 21:16:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,124 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 21:16:59,124 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 8 times [2021-06-05 21:16:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247991042] [2021-06-05 21:16:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247991042] [2021-06-05 21:16:59,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247991042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:59,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100323414] [2021-06-05 21:16:59,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:59,188 INFO L87 Difference]: Start difference. First operand 51 states and 82 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) [2021-06-05 21:16:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,266 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-06-05 21:16:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:59,267 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 18 [2021-06-05 21:16:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,267 INFO L225 Difference]: With dead ends: 103 [2021-06-05 21:16:59,267 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 21:16:59,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 21:16:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-06-05 21:16:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 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) [2021-06-05 21:16:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 83 transitions. [2021-06-05 21:16:59,269 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 83 transitions. Word has length 18 [2021-06-05 21:16:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,269 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 83 transitions. [2021-06-05 21:16:59,269 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) [2021-06-05 21:16:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2021-06-05 21:16:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 21:16:59,270 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 9 times [2021-06-05 21:16:59,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621781256] [2021-06-05 21:16:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621781256] [2021-06-05 21:16:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621781256] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:59,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684091816] [2021-06-05 21:16:59,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:59,312 INFO L87 Difference]: Start difference. First operand 52 states and 83 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) [2021-06-05 21:16:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,391 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2021-06-05 21:16:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:59,391 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 18 [2021-06-05 21:16:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,392 INFO L225 Difference]: With dead ends: 92 [2021-06-05 21:16:59,392 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:16:59,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:16:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-06-05 21:16:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 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) [2021-06-05 21:16:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-06-05 21:16:59,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 18 [2021-06-05 21:16:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,393 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-06-05 21:16:59,393 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) [2021-06-05 21:16:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-06-05 21:16:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,394 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 21:16:59,394 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 10 times [2021-06-05 21:16:59,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389514639] [2021-06-05 21:16:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389514639] [2021-06-05 21:16:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389514639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:16:59,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548819625] [2021-06-05 21:16:59,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:16:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:16:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:16:59,435 INFO L87 Difference]: Start difference. First operand 39 states and 59 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) [2021-06-05 21:16:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,509 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-06-05 21:16:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:16:59,509 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 18 [2021-06-05 21:16:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,510 INFO L225 Difference]: With dead ends: 63 [2021-06-05 21:16:59,510 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 21:16:59,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 21:16:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 21:16:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-06-05 21:16:59,511 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-06-05 21:16:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,511 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-06-05 21:16:59,511 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) [2021-06-05 21:16:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-06-05 21:16:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,511 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 21:16:59,512 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 17 times [2021-06-05 21:16:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152874409] [2021-06-05 21:16:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152874409] [2021-06-05 21:16:59,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152874409] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:59,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285908606] [2021-06-05 21:16:59,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:59,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:59,565 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,676 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-06-05 21:16:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:59,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,677 INFO L225 Difference]: With dead ends: 71 [2021-06-05 21:16:59,677 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 21:16:59,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 21:16:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-06-05 21:16:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 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) [2021-06-05 21:16:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-06-05 21:16:59,678 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 18 [2021-06-05 21:16:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,678 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-06-05 21:16:59,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-06-05 21:16:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,679 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 21:16:59,679 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 18 times [2021-06-05 21:16:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566962395] [2021-06-05 21:16:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566962395] [2021-06-05 21:16:59,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566962395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:59,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033141456] [2021-06-05 21:16:59,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:59,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:59,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:59,737 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,839 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-06-05 21:16:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:16:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:16:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,840 INFO L225 Difference]: With dead ends: 63 [2021-06-05 21:16:59,840 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 21:16:59,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 21:16:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-06-05 21:16:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-06-05 21:16:59,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-06-05 21:16:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:59,841 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-06-05 21:16:59,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:16:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-06-05 21:16:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:16:59,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:59,845 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:59,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 21:16:59,845 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-06-05 21:16:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:59,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397915389] [2021-06-05 21:16:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:59,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:59,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397915389] [2021-06-05 21:16:59,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397915389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:16:59,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:16:59,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:16:59,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453208677] [2021-06-05 21:16:59,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:16:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:16:59,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:16:59,906 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:17:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:00,010 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-06-05 21:17:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:00,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:00,010 INFO L225 Difference]: With dead ends: 52 [2021-06-05 21:17:00,010 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 21:17:00,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 21:17:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-06-05 21:17:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-06-05 21:17:00,012 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2021-06-05 21:17:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:00,012 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-06-05 21:17:00,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:17:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-06-05 21:17:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:00,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:00,012 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:00,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 21:17:00,012 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 20 times [2021-06-05 21:17:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:00,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576600824] [2021-06-05 21:17:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:00,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576600824] [2021-06-05 21:17:00,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576600824] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:17:00,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:17:00,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:17:00,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459015959] [2021-06-05 21:17:00,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:00,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:00,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:00,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:00,064 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:17:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:00,152 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-06-05 21:17:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:00,153 INFO L225 Difference]: With dead ends: 33 [2021-06-05 21:17:00,153 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 21:17:00,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 21:17:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 21:17:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 21:17:00,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-06-05 21:17:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:00,154 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 21:17:00,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-06-05 21:17:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 21:17:00,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 21:17:00,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 21:17:00,156 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:17:00,158 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:17:00 BasicIcfg [2021-06-05 21:17:00,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:17:00,159 INFO L168 Benchmark]: Toolchain (without parser) took 8887.17 ms. Allocated memory was 341.8 MB in the beginning and 411.0 MB in the end (delta: 69.2 MB). Free memory was 321.2 MB in the beginning and 190.1 MB in the end (delta: 131.1 MB). Peak memory consumption was 202.4 MB. Max. memory is 16.0 GB. [2021-06-05 21:17:00,159 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory is still 322.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:17:00,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.67 ms. Allocated memory is still 341.8 MB. Free memory was 321.2 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:17:00,159 INFO L168 Benchmark]: Boogie Preprocessor took 14.17 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.9 MB in the end (delta: 903.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:17:00,159 INFO L168 Benchmark]: RCFGBuilder took 261.89 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 308.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 21:17:00,160 INFO L168 Benchmark]: TraceAbstraction took 8573.42 ms. Allocated memory was 341.8 MB in the beginning and 411.0 MB in the end (delta: 69.2 MB). Free memory was 307.9 MB in the beginning and 190.1 MB in the end (delta: 117.8 MB). Peak memory consumption was 187.7 MB. Max. memory is 16.0 GB. [2021-06-05 21:17:00,160 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory is still 322.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.67 ms. Allocated memory is still 341.8 MB. Free memory was 321.2 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.17 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.9 MB in the end (delta: 903.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 261.89 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 308.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 8573.42 ms. Allocated memory was 341.8 MB in the beginning and 411.0 MB in the end (delta: 69.2 MB). Free memory was 307.9 MB in the beginning and 190.1 MB in the end (delta: 117.8 MB). Peak memory consumption was 187.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 43 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8442.2ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 37.1ms, AutomataDifference: 5109.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2185 SDtfs, 3031 SDslu, 6767 SDs, 0 SdLazy, 2178 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1254.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4836.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 357, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 238.1ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1682 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.2ms SsaConstructionTime, 127.5ms SatisfiabilityAnalysisTime, 2531.7ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5483 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...