/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:05:04,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:05:04,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:05:04,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:05:04,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:05:04,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:05:04,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:05:04,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:05:04,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:05:04,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:05:04,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:05:04,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:05:04,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:05:04,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:05:04,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:05:04,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:05:04,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:05:04,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:05:04,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:05:04,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:05:04,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:05:04,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:05:04,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:05:04,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:05:04,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:05:04,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:05:04,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:05:04,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:05:04,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:05:04,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:05:04,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:05:04,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:05:04,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:05:04,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:05:04,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:05:04,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:05:04,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:05:04,870 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:05:04,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:05:04,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:05:04,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:05:04,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:05:04,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:05:04,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:05:04,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:05:04,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:05:04,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:05:04,876 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:05:04,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:05:04,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:05:04,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:05:04,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:05:04,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:05:04,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:05:04,877 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:05:05,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:05:05,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:05:05,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:05:05,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:05:05,182 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:05:05,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-17 17:05:05,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c74fd1e/a6226a6ef31440459a6ca5239f948707/FLAGef6844f6c [2020-07-17 17:05:05,703 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:05:05,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-17 17:05:05,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c74fd1e/a6226a6ef31440459a6ca5239f948707/FLAGef6844f6c [2020-07-17 17:05:06,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72c74fd1e/a6226a6ef31440459a6ca5239f948707 [2020-07-17 17:05:06,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:05:06,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:05:06,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:06,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:05:06,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:05:06,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263050f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06, skipping insertion in model container [2020-07-17 17:05:06,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:05:06,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:05:06,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:06,348 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:05:06,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:06,382 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:05:06,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06 WrapperNode [2020-07-17 17:05:06,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:06,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:05:06,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:05:06,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:05:06,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (1/1) ... [2020-07-17 17:05:06,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:05:06,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:05:06,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:05:06,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:05:06,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (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 [2020-07-17 17:05:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:05:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:05:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-17 17:05:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-17 17:05:06,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:05:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:05:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:05:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-17 17:05:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-17 17:05:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:05:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:05:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:05:06,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:05:06,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:05:06,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:06 BoogieIcfgContainer [2020-07-17 17:05:06,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:05:06,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:05:06,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:05:06,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:05:06,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:05:06" (1/3) ... [2020-07-17 17:05:06,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3924cde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:06, skipping insertion in model container [2020-07-17 17:05:06,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:06" (2/3) ... [2020-07-17 17:05:06,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3924cde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:06, skipping insertion in model container [2020-07-17 17:05:06,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:06" (3/3) ... [2020-07-17 17:05:06,845 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-17 17:05:06,879 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:05:06,898 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:05:06,935 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:05:06,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:05:06,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:05:06,962 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:05:06,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:05:06,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:05:06,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:05:06,963 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:05:06,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:05:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-17 17:05:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 17:05:06,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:06,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:06,994 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1047957633, now seen corresponding path program 1 times [2020-07-17 17:05:07,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:07,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472884939] [2020-07-17 17:05:07,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:07,497 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2020-07-17 17:05:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:07,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472884939] [2020-07-17 17:05:07,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:07,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:05:07,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169647827] [2020-07-17 17:05:07,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:05:07,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:05:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:05:07,610 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 9 states. [2020-07-17 17:05:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:07,957 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-07-17 17:05:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:05:07,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-17 17:05:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:07,971 INFO L225 Difference]: With dead ends: 62 [2020-07-17 17:05:07,972 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 17:05:07,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:05:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 17:05:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-17 17:05:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 17:05:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-17 17:05:08,034 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 20 [2020-07-17 17:05:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:08,035 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-17 17:05:08,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:05:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-17 17:05:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 17:05:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:08,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:08,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:05:08,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1743555941, now seen corresponding path program 1 times [2020-07-17 17:05:08,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:08,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430027671] [2020-07-17 17:05:08,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,343 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2020-07-17 17:05:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:08,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430027671] [2020-07-17 17:05:08,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:08,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:05:08,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325603820] [2020-07-17 17:05:08,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:05:08,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:05:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:05:08,407 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2020-07-17 17:05:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:08,576 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-07-17 17:05:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:05:08,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-07-17 17:05:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:08,579 INFO L225 Difference]: With dead ends: 49 [2020-07-17 17:05:08,579 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 17:05:08,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:05:08,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 17:05:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-17 17:05:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 17:05:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-17 17:05:08,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 21 [2020-07-17 17:05:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:08,592 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-17 17:05:08,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:05:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-17 17:05:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 17:05:08,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:08,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:08,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:05:08,594 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 698419476, now seen corresponding path program 1 times [2020-07-17 17:05:08,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:08,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105359467] [2020-07-17 17:05:08,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:08,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105359467] [2020-07-17 17:05:08,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:08,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:05:08,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745748697] [2020-07-17 17:05:08,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:05:08,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:05:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:05:08,664 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-07-17 17:05:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:08,707 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-07-17 17:05:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:05:08,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-07-17 17:05:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:08,709 INFO L225 Difference]: With dead ends: 61 [2020-07-17 17:05:08,710 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 17:05:08,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 17:05:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-07-17 17:05:08,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 17:05:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-17 17:05:08,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 29 [2020-07-17 17:05:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:08,721 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-17 17:05:08,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:05:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-17 17:05:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 17:05:08,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:08,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:08,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:05:08,723 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:08,724 INFO L82 PathProgramCache]: Analyzing trace with hash 735393428, now seen corresponding path program 1 times [2020-07-17 17:05:08,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:08,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597749634] [2020-07-17 17:05:08,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,951 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 18 [2020-07-17 17:05:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:09,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597749634] [2020-07-17 17:05:09,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:09,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-17 17:05:09,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401136083] [2020-07-17 17:05:09,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:05:09,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:05:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:05:09,121 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 12 states. [2020-07-17 17:05:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:09,402 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-07-17 17:05:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:05:09,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-07-17 17:05:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:09,404 INFO L225 Difference]: With dead ends: 53 [2020-07-17 17:05:09,404 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 17:05:09,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:05:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 17:05:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-17 17:05:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 17:05:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-17 17:05:09,415 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 30 [2020-07-17 17:05:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:09,416 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-17 17:05:09,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:05:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-17 17:05:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 17:05:09,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:09,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:09,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:05:09,418 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1128861445, now seen corresponding path program 1 times [2020-07-17 17:05:09,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:09,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240372168] [2020-07-17 17:05:09,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:05:09,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240372168] [2020-07-17 17:05:09,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:09,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:05:09,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451832422] [2020-07-17 17:05:09,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:05:09,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:05:09,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:05:09,494 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2020-07-17 17:05:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:09,544 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-07-17 17:05:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:05:09,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-17 17:05:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:09,546 INFO L225 Difference]: With dead ends: 63 [2020-07-17 17:05:09,546 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 17:05:09,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 17:05:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-17 17:05:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 17:05:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-17 17:05:09,556 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2020-07-17 17:05:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:09,557 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-17 17:05:09,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:05:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-17 17:05:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 17:05:09,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:09,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:09,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:05:09,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -211667235, now seen corresponding path program 1 times [2020-07-17 17:05:09,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:09,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827969489] [2020-07-17 17:05:09,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 17:05:09,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827969489] [2020-07-17 17:05:09,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:09,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:05:09,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916498790] [2020-07-17 17:05:09,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:05:09,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:05:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:05:09,916 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 14 states. [2020-07-17 17:05:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:10,248 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-07-17 17:05:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:05:10,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-07-17 17:05:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:10,253 INFO L225 Difference]: With dead ends: 62 [2020-07-17 17:05:10,253 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 17:05:10,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:05:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 17:05:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-07-17 17:05:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 17:05:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-17 17:05:10,274 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-07-17 17:05:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:10,275 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-17 17:05:10,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:05:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-17 17:05:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 17:05:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:10,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:10,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:05:10,278 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1757163992, now seen corresponding path program 1 times [2020-07-17 17:05:10,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:10,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172187341] [2020-07-17 17:05:10,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 17:05:10,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172187341] [2020-07-17 17:05:10,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:10,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 17:05:10,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702600902] [2020-07-17 17:05:10,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 17:05:10,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 17:05:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:05:10,661 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 15 states. [2020-07-17 17:05:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:11,154 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-07-17 17:05:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:05:11,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-07-17 17:05:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:11,156 INFO L225 Difference]: With dead ends: 72 [2020-07-17 17:05:11,156 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 17:05:11,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:05:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 17:05:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-07-17 17:05:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 17:05:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-07-17 17:05:11,167 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-07-17 17:05:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:11,168 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-07-17 17:05:11,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 17:05:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-07-17 17:05:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-17 17:05:11,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:11,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:11,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:05:11,170 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash 338577365, now seen corresponding path program 2 times [2020-07-17 17:05:11,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:11,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87861291] [2020-07-17 17:05:11,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-17 17:05:11,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87861291] [2020-07-17 17:05:11,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:11,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 17:05:11,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171724422] [2020-07-17 17:05:11,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 17:05:11,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 17:05:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:05:11,617 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 18 states. [2020-07-17 17:05:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:12,269 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-07-17 17:05:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 17:05:12,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-07-17 17:05:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:12,274 INFO L225 Difference]: With dead ends: 82 [2020-07-17 17:05:12,274 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 17:05:12,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:05:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 17:05:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-07-17 17:05:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-17 17:05:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-07-17 17:05:12,287 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 57 [2020-07-17 17:05:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:12,288 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-07-17 17:05:12,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 17:05:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-07-17 17:05:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-17 17:05:12,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:12,290 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:12,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:05:12,297 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1346648732, now seen corresponding path program 2 times [2020-07-17 17:05:12,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:12,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106564810] [2020-07-17 17:05:12,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-17 17:05:12,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106564810] [2020-07-17 17:05:12,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:12,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 17:05:12,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899752396] [2020-07-17 17:05:12,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 17:05:12,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 17:05:12,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:05:12,820 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 19 states. [2020-07-17 17:05:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:13,613 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-07-17 17:05:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 17:05:13,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-07-17 17:05:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:13,615 INFO L225 Difference]: With dead ends: 92 [2020-07-17 17:05:13,615 INFO L226 Difference]: Without dead ends: 85 [2020-07-17 17:05:13,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 17:05:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-17 17:05:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-07-17 17:05:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 17:05:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-07-17 17:05:13,630 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 66 [2020-07-17 17:05:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:13,630 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-07-17 17:05:13,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 17:05:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-07-17 17:05:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-17 17:05:13,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:13,632 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:13,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:05:13,632 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2107047859, now seen corresponding path program 3 times [2020-07-17 17:05:13,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:13,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577704123] [2020-07-17 17:05:13,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-17 17:05:14,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577704123] [2020-07-17 17:05:14,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:14,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 17:05:14,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731424584] [2020-07-17 17:05:14,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 17:05:14,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 17:05:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:05:14,222 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 22 states. [2020-07-17 17:05:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:15,140 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-17 17:05:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 17:05:15,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-07-17 17:05:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:15,144 INFO L225 Difference]: With dead ends: 102 [2020-07-17 17:05:15,144 INFO L226 Difference]: Without dead ends: 95 [2020-07-17 17:05:15,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1738, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 17:05:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-17 17:05:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-07-17 17:05:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 17:05:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-07-17 17:05:15,179 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 75 [2020-07-17 17:05:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:15,180 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-07-17 17:05:15,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 17:05:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-07-17 17:05:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-17 17:05:15,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:15,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:15,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:05:15,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1688547104, now seen corresponding path program 3 times [2020-07-17 17:05:15,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:15,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025740615] [2020-07-17 17:05:15,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-17 17:05:15,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025740615] [2020-07-17 17:05:15,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:15,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 17:05:15,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064437771] [2020-07-17 17:05:15,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 17:05:15,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:15,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 17:05:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-07-17 17:05:15,905 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 23 states. [2020-07-17 17:05:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:17,093 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-07-17 17:05:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 17:05:17,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-07-17 17:05:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:17,094 INFO L225 Difference]: With dead ends: 112 [2020-07-17 17:05:17,094 INFO L226 Difference]: Without dead ends: 105 [2020-07-17 17:05:17,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 17:05:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-17 17:05:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2020-07-17 17:05:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-17 17:05:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-07-17 17:05:17,126 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 84 [2020-07-17 17:05:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:17,127 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-07-17 17:05:17,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 17:05:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-07-17 17:05:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 17:05:17,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:17,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:17,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:05:17,129 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -751656891, now seen corresponding path program 4 times [2020-07-17 17:05:17,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:17,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609711011] [2020-07-17 17:05:17,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-17 17:05:17,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609711011] [2020-07-17 17:05:17,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:17,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 17:05:17,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968829492] [2020-07-17 17:05:17,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 17:05:17,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 17:05:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:05:17,999 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 26 states. [2020-07-17 17:05:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:19,238 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-07-17 17:05:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 17:05:19,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 93 [2020-07-17 17:05:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:19,241 INFO L225 Difference]: With dead ends: 122 [2020-07-17 17:05:19,241 INFO L226 Difference]: Without dead ends: 115 [2020-07-17 17:05:19,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=2670, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 17:05:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-17 17:05:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2020-07-17 17:05:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 17:05:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-07-17 17:05:19,261 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 93 [2020-07-17 17:05:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:19,261 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-07-17 17:05:19,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 17:05:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-07-17 17:05:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-17 17:05:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:19,263 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:19,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:05:19,263 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1934265180, now seen corresponding path program 4 times [2020-07-17 17:05:19,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:19,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063415447] [2020-07-17 17:05:19,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-17 17:05:20,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063415447] [2020-07-17 17:05:20,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:20,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 17:05:20,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455752740] [2020-07-17 17:05:20,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 17:05:20,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 17:05:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-07-17 17:05:20,211 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-07-17 17:05:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:21,731 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-17 17:05:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 17:05:21,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-07-17 17:05:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:21,733 INFO L225 Difference]: With dead ends: 132 [2020-07-17 17:05:21,733 INFO L226 Difference]: Without dead ends: 125 [2020-07-17 17:05:21,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 17:05:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-17 17:05:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-07-17 17:05:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-17 17:05:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-07-17 17:05:21,751 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 102 [2020-07-17 17:05:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:21,751 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-07-17 17:05:21,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 17:05:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-07-17 17:05:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-17 17:05:21,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:21,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:21,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:05:21,753 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -390895683, now seen corresponding path program 5 times [2020-07-17 17:05:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:21,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137320327] [2020-07-17 17:05:21,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-17 17:05:22,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137320327] [2020-07-17 17:05:22,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:22,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-17 17:05:22,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168819512] [2020-07-17 17:05:22,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 17:05:22,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 17:05:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:05:22,823 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 30 states. [2020-07-17 17:05:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:24,578 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-07-17 17:05:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 17:05:24,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-07-17 17:05:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:24,580 INFO L225 Difference]: With dead ends: 142 [2020-07-17 17:05:24,580 INFO L226 Difference]: Without dead ends: 135 [2020-07-17 17:05:24,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=230, Invalid=3802, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 17:05:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-17 17:05:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 88. [2020-07-17 17:05:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-17 17:05:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-07-17 17:05:24,598 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 111 [2020-07-17 17:05:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:24,598 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-07-17 17:05:24,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 17:05:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-07-17 17:05:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-17 17:05:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:24,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:24,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:05:24,600 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2094114280, now seen corresponding path program 5 times [2020-07-17 17:05:24,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:24,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562497823] [2020-07-17 17:05:24,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-17 17:05:25,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562497823] [2020-07-17 17:05:25,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:25,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-17 17:05:25,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466865925] [2020-07-17 17:05:25,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 17:05:25,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:25,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 17:05:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-07-17 17:05:25,763 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 31 states. [2020-07-17 17:05:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:27,834 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-07-17 17:05:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 17:05:27,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 120 [2020-07-17 17:05:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:27,836 INFO L225 Difference]: With dead ends: 152 [2020-07-17 17:05:27,836 INFO L226 Difference]: Without dead ends: 145 [2020-07-17 17:05:27,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 17:05:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-17 17:05:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-07-17 17:05:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-17 17:05:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-07-17 17:05:27,860 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 120 [2020-07-17 17:05:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:27,860 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-07-17 17:05:27,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 17:05:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-07-17 17:05:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-17 17:05:27,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:27,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:27,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:05:27,861 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash -501508427, now seen corresponding path program 6 times [2020-07-17 17:05:27,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:27,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546115548] [2020-07-17 17:05:27,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-17 17:05:29,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546115548] [2020-07-17 17:05:29,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:29,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-17 17:05:29,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764691537] [2020-07-17 17:05:29,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 17:05:29,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:29,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 17:05:29,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1054, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:05:29,192 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 34 states. [2020-07-17 17:05:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:31,473 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-17 17:05:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-17 17:05:31,474 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 129 [2020-07-17 17:05:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:31,475 INFO L225 Difference]: With dead ends: 162 [2020-07-17 17:05:31,476 INFO L226 Difference]: Without dead ends: 155 [2020-07-17 17:05:31,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=268, Invalid=5134, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 17:05:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-17 17:05:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-07-17 17:05:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-17 17:05:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-07-17 17:05:31,497 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 129 [2020-07-17 17:05:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:31,497 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-07-17 17:05:31,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 17:05:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-07-17 17:05:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-17 17:05:31,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:31,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:31,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:05:31,499 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash -436935508, now seen corresponding path program 6 times [2020-07-17 17:05:31,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:31,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236262814] [2020-07-17 17:05:31,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-17 17:05:32,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236262814] [2020-07-17 17:05:32,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:32,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-17 17:05:32,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687527390] [2020-07-17 17:05:32,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 17:05:32,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 17:05:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 17:05:32,940 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 36 states. [2020-07-17 17:05:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:35,600 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-17 17:05:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-17 17:05:35,600 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2020-07-17 17:05:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:35,602 INFO L225 Difference]: With dead ends: 172 [2020-07-17 17:05:35,602 INFO L226 Difference]: Without dead ends: 165 [2020-07-17 17:05:35,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=287, Invalid=5875, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 17:05:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-17 17:05:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 103. [2020-07-17 17:05:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-17 17:05:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-07-17 17:05:35,634 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 138 [2020-07-17 17:05:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:35,634 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-07-17 17:05:35,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 17:05:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-07-17 17:05:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-17 17:05:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:35,636 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:35,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:05:35,636 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1952223955, now seen corresponding path program 7 times [2020-07-17 17:05:35,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:35,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367140163] [2020-07-17 17:05:35,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-17 17:05:37,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367140163] [2020-07-17 17:05:37,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:37,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-17 17:05:37,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255005108] [2020-07-17 17:05:37,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 17:05:37,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:37,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 17:05:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 17:05:37,164 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 38 states. [2020-07-17 17:05:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:40,022 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-07-17 17:05:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-17 17:05:40,023 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 147 [2020-07-17 17:05:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:40,024 INFO L225 Difference]: With dead ends: 182 [2020-07-17 17:05:40,024 INFO L226 Difference]: Without dead ends: 175 [2020-07-17 17:05:40,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=306, Invalid=6666, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 17:05:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-17 17:05:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 108. [2020-07-17 17:05:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-17 17:05:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-07-17 17:05:40,068 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 147 [2020-07-17 17:05:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:40,069 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-07-17 17:05:40,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 17:05:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-07-17 17:05:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-17 17:05:40,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:40,070 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:40,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 17:05:40,070 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash -265506576, now seen corresponding path program 7 times [2020-07-17 17:05:40,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:40,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984120926] [2020-07-17 17:05:40,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-17 17:05:41,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984120926] [2020-07-17 17:05:41,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:41,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-17 17:05:41,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428902603] [2020-07-17 17:05:41,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-17 17:05:41,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-17 17:05:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 17:05:41,879 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 39 states. [2020-07-17 17:05:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:45,226 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-17 17:05:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 17:05:45,226 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-07-17 17:05:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:45,228 INFO L225 Difference]: With dead ends: 192 [2020-07-17 17:05:45,228 INFO L226 Difference]: Without dead ends: 185 [2020-07-17 17:05:45,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=319, Invalid=7337, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 17:05:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-17 17:05:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 113. [2020-07-17 17:05:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-17 17:05:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-07-17 17:05:45,260 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 156 [2020-07-17 17:05:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:45,260 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-07-17 17:05:45,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-17 17:05:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-07-17 17:05:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-07-17 17:05:45,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:45,262 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:45,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 17:05:45,262 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:45,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1317743397, now seen corresponding path program 8 times [2020-07-17 17:05:45,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:45,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606765260] [2020-07-17 17:05:45,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-17 17:05:47,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606765260] [2020-07-17 17:05:47,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:47,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-17 17:05:47,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242262974] [2020-07-17 17:05:47,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 17:05:47,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 17:05:47,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 17:05:47,648 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 42 states. [2020-07-17 17:05:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:51,348 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-07-17 17:05:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-17 17:05:51,349 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2020-07-17 17:05:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:51,352 INFO L225 Difference]: With dead ends: 202 [2020-07-17 17:05:51,352 INFO L226 Difference]: Without dead ends: 195 [2020-07-17 17:05:51,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=344, Invalid=8398, Unknown=0, NotChecked=0, Total=8742 [2020-07-17 17:05:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-17 17:05:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 118. [2020-07-17 17:05:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-17 17:05:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-07-17 17:05:51,406 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 165 [2020-07-17 17:05:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:51,406 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-07-17 17:05:51,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 17:05:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-07-17 17:05:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-17 17:05:51,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:51,408 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:51,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 17:05:51,408 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2102299316, now seen corresponding path program 8 times [2020-07-17 17:05:51,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:51,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042270798] [2020-07-17 17:05:51,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-17 17:05:53,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042270798] [2020-07-17 17:05:53,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:53,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-07-17 17:05:53,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107394675] [2020-07-17 17:05:53,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 17:05:53,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 17:05:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 17:05:53,488 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 44 states. [2020-07-17 17:05:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:57,564 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-07-17 17:05:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-17 17:05:57,564 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 174 [2020-07-17 17:05:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:57,566 INFO L225 Difference]: With dead ends: 212 [2020-07-17 17:05:57,566 INFO L226 Difference]: Without dead ends: 205 [2020-07-17 17:05:57,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=363, Invalid=9339, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 17:05:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-17 17:05:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 123. [2020-07-17 17:05:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-17 17:05:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-07-17 17:05:57,615 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 174 [2020-07-17 17:05:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:57,615 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-07-17 17:05:57,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 17:05:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-07-17 17:05:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-07-17 17:05:57,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:57,616 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:57,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 17:05:57,617 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1592061795, now seen corresponding path program 9 times [2020-07-17 17:05:57,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:57,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035206929] [2020-07-17 17:05:57,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:57,844 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:05:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-17 17:06:00,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035206929] [2020-07-17 17:06:00,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:00,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-07-17 17:06:00,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468325774] [2020-07-17 17:06:00,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 17:06:00,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:00,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 17:06:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 17:06:00,208 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 46 states. [2020-07-17 17:06:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:04,584 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-17 17:06:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-17 17:06:04,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 183 [2020-07-17 17:06:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:04,589 INFO L225 Difference]: With dead ends: 222 [2020-07-17 17:06:04,589 INFO L226 Difference]: Without dead ends: 215 [2020-07-17 17:06:04,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=382, Invalid=10330, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 17:06:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-17 17:06:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 128. [2020-07-17 17:06:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-17 17:06:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-07-17 17:06:04,648 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 183 [2020-07-17 17:06:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:04,648 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-07-17 17:06:04,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 17:06:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-07-17 17:06:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-07-17 17:06:04,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:04,650 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:04,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 17:06:04,650 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1258819080, now seen corresponding path program 9 times [2020-07-17 17:06:04,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:04,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273809020] [2020-07-17 17:06:04,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:04,848 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-07-17 17:06:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-17 17:06:07,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273809020] [2020-07-17 17:06:07,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:07,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-07-17 17:06:07,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471397063] [2020-07-17 17:06:07,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 17:06:07,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 17:06:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 17:06:07,277 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 48 states. [2020-07-17 17:06:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:12,481 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-07-17 17:06:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-17 17:06:12,482 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 192 [2020-07-17 17:06:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:12,483 INFO L225 Difference]: With dead ends: 232 [2020-07-17 17:06:12,483 INFO L226 Difference]: Without dead ends: 225 [2020-07-17 17:06:12,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=406, Invalid=11584, Unknown=0, NotChecked=0, Total=11990 [2020-07-17 17:06:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-17 17:06:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 133. [2020-07-17 17:06:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-17 17:06:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-07-17 17:06:12,536 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 192 [2020-07-17 17:06:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:12,537 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-07-17 17:06:12,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 17:06:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-07-17 17:06:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-17 17:06:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:12,539 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:12,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 17:06:12,540 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash -157065835, now seen corresponding path program 10 times [2020-07-17 17:06:12,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:12,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830792281] [2020-07-17 17:06:12,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-17 17:06:15,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830792281] [2020-07-17 17:06:15,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:15,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-07-17 17:06:15,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549098098] [2020-07-17 17:06:15,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 17:06:15,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 17:06:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2350, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 17:06:15,429 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 50 states. [2020-07-17 17:06:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:20,872 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-17 17:06:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-17 17:06:20,872 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 201 [2020-07-17 17:06:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:20,874 INFO L225 Difference]: With dead ends: 242 [2020-07-17 17:06:20,874 INFO L226 Difference]: Without dead ends: 235 [2020-07-17 17:06:20,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=420, Invalid=12462, Unknown=0, NotChecked=0, Total=12882 [2020-07-17 17:06:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-17 17:06:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 138. [2020-07-17 17:06:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-17 17:06:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-07-17 17:06:20,938 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 201 [2020-07-17 17:06:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:20,938 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-07-17 17:06:20,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 17:06:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-07-17 17:06:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-07-17 17:06:20,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:20,940 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:20,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 17:06:20,940 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 277767868, now seen corresponding path program 10 times [2020-07-17 17:06:20,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:20,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20071881] [2020-07-17 17:06:20,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-17 17:06:24,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20071881] [2020-07-17 17:06:24,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:24,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-07-17 17:06:24,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520648809] [2020-07-17 17:06:24,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-17 17:06:24,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-17 17:06:24,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 17:06:24,046 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 51 states. [2020-07-17 17:06:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:30,035 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-17 17:06:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-17 17:06:30,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 210 [2020-07-17 17:06:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:30,040 INFO L225 Difference]: With dead ends: 252 [2020-07-17 17:06:30,040 INFO L226 Difference]: Without dead ends: 245 [2020-07-17 17:06:30,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=433, Invalid=13373, Unknown=0, NotChecked=0, Total=13806 [2020-07-17 17:06:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-17 17:06:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 143. [2020-07-17 17:06:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-17 17:06:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2020-07-17 17:06:30,118 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 210 [2020-07-17 17:06:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:30,119 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2020-07-17 17:06:30,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-17 17:06:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2020-07-17 17:06:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-17 17:06:30,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:30,121 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:30,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 17:06:30,121 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:30,121 INFO L82 PathProgramCache]: Analyzing trace with hash 796676621, now seen corresponding path program 11 times [2020-07-17 17:06:30,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:30,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692783902] [2020-07-17 17:06:30,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,379 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2020-07-17 17:06:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-17 17:06:33,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692783902] [2020-07-17 17:06:33,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:33,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-07-17 17:06:33,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746497238] [2020-07-17 17:06:33,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 17:06:33,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:33,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 17:06:33,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2754, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 17:06:33,653 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 54 states. [2020-07-17 17:06:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:39,972 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-07-17 17:06:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-17 17:06:39,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 219 [2020-07-17 17:06:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:39,974 INFO L225 Difference]: With dead ends: 262 [2020-07-17 17:06:39,975 INFO L226 Difference]: Without dead ends: 255 [2020-07-17 17:06:39,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=458, Invalid=14794, Unknown=0, NotChecked=0, Total=15252 [2020-07-17 17:06:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-17 17:06:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 148. [2020-07-17 17:06:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-17 17:06:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-07-17 17:06:40,070 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 219 [2020-07-17 17:06:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:40,070 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-07-17 17:06:40,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 17:06:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-07-17 17:06:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-07-17 17:06:40,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:40,072 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:40,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 17:06:40,073 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash -415274752, now seen corresponding path program 11 times [2020-07-17 17:06:40,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:40,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341538989] [2020-07-17 17:06:40,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,308 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-07-17 17:06:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 0 proven. 627 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-17 17:06:43,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341538989] [2020-07-17 17:06:43,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:43,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-07-17 17:06:43,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250712278] [2020-07-17 17:06:43,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 17:06:43,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 17:06:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 17:06:43,908 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 55 states. [2020-07-17 17:06:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:06:51,026 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-07-17 17:06:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-17 17:06:51,026 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 228 [2020-07-17 17:06:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:06:51,028 INFO L225 Difference]: With dead ends: 272 [2020-07-17 17:06:51,028 INFO L226 Difference]: Without dead ends: 265 [2020-07-17 17:06:51,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=471, Invalid=15785, Unknown=0, NotChecked=0, Total=16256 [2020-07-17 17:06:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-17 17:06:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 153. [2020-07-17 17:06:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-17 17:06:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2020-07-17 17:06:51,151 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 228 [2020-07-17 17:06:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:06:51,151 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2020-07-17 17:06:51,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 17:06:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2020-07-17 17:06:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-17 17:06:51,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:06:51,153 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:06:51,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 17:06:51,154 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:06:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:06:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1996083707, now seen corresponding path program 12 times [2020-07-17 17:06:51,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:06:51,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287968681] [2020-07-17 17:06:51,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:06:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:06:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-17 17:06:55,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287968681] [2020-07-17 17:06:55,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:06:55,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-07-17 17:06:55,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657155330] [2020-07-17 17:06:55,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-07-17 17:06:55,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:06:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-07-17 17:06:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3190, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 17:06:55,177 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 58 states. [2020-07-17 17:07:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:07:02,816 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2020-07-17 17:07:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-17 17:07:02,817 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 237 [2020-07-17 17:07:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:07:02,819 INFO L225 Difference]: With dead ends: 282 [2020-07-17 17:07:02,820 INFO L226 Difference]: Without dead ends: 275 [2020-07-17 17:07:02,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=496, Invalid=17326, Unknown=0, NotChecked=0, Total=17822 [2020-07-17 17:07:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-17 17:07:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 158. [2020-07-17 17:07:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-17 17:07:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-07-17 17:07:02,959 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 237 [2020-07-17 17:07:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:07:02,960 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-07-17 17:07:02,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-07-17 17:07:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-07-17 17:07:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-17 17:07:02,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:07:02,962 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:07:02,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 17:07:02,962 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:07:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:07:02,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2046851268, now seen corresponding path program 12 times [2020-07-17 17:07:02,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:07:02,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300057609] [2020-07-17 17:07:02,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:07:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,158 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 16 [2020-07-17 17:07:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 0 proven. 744 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-17 17:07:07,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300057609] [2020-07-17 17:07:07,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:07:07,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-07-17 17:07:07,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615590434] [2020-07-17 17:07:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-17 17:07:07,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:07:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-17 17:07:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 17:07:07,300 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 59 states. [2020-07-17 17:07:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:07:15,456 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2020-07-17 17:07:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-17 17:07:15,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 246 [2020-07-17 17:07:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:07:15,459 INFO L225 Difference]: With dead ends: 292 [2020-07-17 17:07:15,459 INFO L226 Difference]: Without dead ends: 285 [2020-07-17 17:07:15,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3132 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=509, Invalid=18397, Unknown=0, NotChecked=0, Total=18906 [2020-07-17 17:07:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-17 17:07:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 163. [2020-07-17 17:07:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-17 17:07:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2020-07-17 17:07:15,568 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 246 [2020-07-17 17:07:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:07:15,569 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2020-07-17 17:07:15,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-17 17:07:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2020-07-17 17:07:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-17 17:07:15,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:07:15,571 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:07:15,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 17:07:15,571 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:07:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:07:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 229192061, now seen corresponding path program 13 times [2020-07-17 17:07:15,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:07:15,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107620983] [2020-07-17 17:07:15,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:07:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 0 proven. 806 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-17 17:07:20,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107620983] [2020-07-17 17:07:20,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:07:20,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-07-17 17:07:20,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140748568] [2020-07-17 17:07:20,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-17 17:07:20,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:07:20,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-17 17:07:20,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3658, Unknown=0, NotChecked=0, Total=3782 [2020-07-17 17:07:20,237 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 62 states. [2020-07-17 17:07:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:07:28,985 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2020-07-17 17:07:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-17 17:07:28,985 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 255 [2020-07-17 17:07:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:07:28,987 INFO L225 Difference]: With dead ends: 302 [2020-07-17 17:07:28,987 INFO L226 Difference]: Without dead ends: 295 [2020-07-17 17:07:28,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=534, Invalid=20058, Unknown=0, NotChecked=0, Total=20592 [2020-07-17 17:07:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-17 17:07:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 168. [2020-07-17 17:07:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-17 17:07:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-07-17 17:07:29,115 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 255 [2020-07-17 17:07:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:07:29,116 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-07-17 17:07:29,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-17 17:07:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-07-17 17:07:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-07-17 17:07:29,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:07:29,117 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:07:29,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 17:07:29,118 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:07:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:07:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2140083720, now seen corresponding path program 13 times [2020-07-17 17:07:29,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:07:29,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175723407] [2020-07-17 17:07:29,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:07:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,355 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-07-17 17:07:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1586 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-17 17:07:34,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175723407] [2020-07-17 17:07:34,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:07:34,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-07-17 17:07:34,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104512625] [2020-07-17 17:07:34,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-17 17:07:34,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:07:34,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-17 17:07:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 17:07:34,317 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 63 states. [2020-07-17 17:07:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:07:43,988 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2020-07-17 17:07:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-17 17:07:43,988 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 264 [2020-07-17 17:07:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:07:43,990 INFO L225 Difference]: With dead ends: 312 [2020-07-17 17:07:43,991 INFO L226 Difference]: Without dead ends: 305 [2020-07-17 17:07:43,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=547, Invalid=21209, Unknown=0, NotChecked=0, Total=21756 [2020-07-17 17:07:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-17 17:07:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 173. [2020-07-17 17:07:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-17 17:07:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2020-07-17 17:07:44,179 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 264 [2020-07-17 17:07:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:07:44,179 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2020-07-17 17:07:44,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-17 17:07:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2020-07-17 17:07:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-07-17 17:07:44,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:07:44,182 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:07:44,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 17:07:44,182 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:07:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:07:44,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2066375563, now seen corresponding path program 14 times [2020-07-17 17:07:44,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:07:44,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248738332] [2020-07-17 17:07:44,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:07:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,480 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2020-07-17 17:07:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:07:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 938 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-17 17:07:49,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248738332] [2020-07-17 17:07:49,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:07:49,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-07-17 17:07:49,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867875448] [2020-07-17 17:07:49,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-17 17:07:49,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:07:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-17 17:07:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4158, Unknown=0, NotChecked=0, Total=4290 [2020-07-17 17:07:49,769 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 66 states. [2020-07-17 17:07:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:07:59,862 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-07-17 17:07:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-17 17:07:59,863 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 273 [2020-07-17 17:07:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:07:59,865 INFO L225 Difference]: With dead ends: 322 [2020-07-17 17:07:59,865 INFO L226 Difference]: Without dead ends: 315 [2020-07-17 17:07:59,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4179 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=572, Invalid=22990, Unknown=0, NotChecked=0, Total=23562 [2020-07-17 17:07:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-17 17:07:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 178. [2020-07-17 17:07:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-17 17:07:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2020-07-17 17:07:59,986 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 273 [2020-07-17 17:07:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:07:59,987 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2020-07-17 17:07:59,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-17 17:07:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2020-07-17 17:07:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-07-17 17:07:59,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:07:59,989 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:07:59,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 17:07:59,989 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:07:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:07:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 812695756, now seen corresponding path program 14 times [2020-07-17 17:07:59,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:07:59,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975604391] [2020-07-17 17:07:59,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:08:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,245 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 17 [2020-07-17 17:08:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-17 17:08:06,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975604391] [2020-07-17 17:08:06,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:08:06,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-07-17 17:08:06,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172323440] [2020-07-17 17:08:06,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-17 17:08:06,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:08:06,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-17 17:08:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 17:08:06,356 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 67 states. [2020-07-17 17:08:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:08:17,447 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2020-07-17 17:08:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-17 17:08:17,447 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 282 [2020-07-17 17:08:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:08:17,450 INFO L225 Difference]: With dead ends: 332 [2020-07-17 17:08:17,450 INFO L226 Difference]: Without dead ends: 325 [2020-07-17 17:08:17,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4154 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=585, Invalid=24221, Unknown=0, NotChecked=0, Total=24806 [2020-07-17 17:08:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-17 17:08:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 183. [2020-07-17 17:08:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-17 17:08:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-07-17 17:08:17,651 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 282 [2020-07-17 17:08:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:08:17,651 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-07-17 17:08:17,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-17 17:08:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-07-17 17:08:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-07-17 17:08:17,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:08:17,654 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:08:17,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-17 17:08:17,654 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:08:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:08:17,654 INFO L82 PathProgramCache]: Analyzing trace with hash -486297875, now seen corresponding path program 15 times [2020-07-17 17:08:17,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:08:17,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479221219] [2020-07-17 17:08:17,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:08:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:17,966 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2020-07-17 17:08:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-17 17:08:24,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479221219] [2020-07-17 17:08:24,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:08:24,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-07-17 17:08:24,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326600272] [2020-07-17 17:08:24,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-17 17:08:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:08:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-17 17:08:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4690, Unknown=0, NotChecked=0, Total=4830 [2020-07-17 17:08:24,114 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 70 states. [2020-07-17 17:08:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:08:36,010 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2020-07-17 17:08:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-17 17:08:36,011 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 291 [2020-07-17 17:08:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:08:36,014 INFO L225 Difference]: With dead ends: 342 [2020-07-17 17:08:36,014 INFO L226 Difference]: Without dead ends: 335 [2020-07-17 17:08:36,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4746 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=610, Invalid=26122, Unknown=0, NotChecked=0, Total=26732 [2020-07-17 17:08:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-07-17 17:08:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 188. [2020-07-17 17:08:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-17 17:08:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2020-07-17 17:08:36,228 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 291 [2020-07-17 17:08:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:08:36,229 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2020-07-17 17:08:36,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-17 17:08:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2020-07-17 17:08:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-17 17:08:36,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:08:36,230 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:08:36,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-17 17:08:36,231 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:08:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:08:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash -755828464, now seen corresponding path program 15 times [2020-07-17 17:08:36,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:08:36,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493456673] [2020-07-17 17:08:36,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:08:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,473 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2020-07-17 17:08:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 1155 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-17 17:08:43,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493456673] [2020-07-17 17:08:43,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:08:43,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-07-17 17:08:43,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417435470] [2020-07-17 17:08:43,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-17 17:08:43,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:08:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-17 17:08:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=4968, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 17:08:43,237 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand 72 states. [2020-07-17 17:08:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:08:56,575 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2020-07-17 17:08:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-07-17 17:08:56,575 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 300 [2020-07-17 17:08:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:08:56,578 INFO L225 Difference]: With dead ends: 352 [2020-07-17 17:08:56,578 INFO L226 Difference]: Without dead ends: 345 [2020-07-17 17:08:56,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5043 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=629, Invalid=27763, Unknown=0, NotChecked=0, Total=28392 [2020-07-17 17:08:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-07-17 17:08:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 193. [2020-07-17 17:08:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-17 17:08:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2020-07-17 17:08:56,741 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 300 [2020-07-17 17:08:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:08:56,741 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2020-07-17 17:08:56,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-17 17:08:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2020-07-17 17:08:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-07-17 17:08:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:08:56,744 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:08:56,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-17 17:08:56,744 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:08:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:08:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 968075493, now seen corresponding path program 16 times [2020-07-17 17:08:56,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:08:56,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745971167] [2020-07-17 17:08:56,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:08:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:08:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1232 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-17 17:09:04,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745971167] [2020-07-17 17:09:04,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:09:04,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-07-17 17:09:04,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464300818] [2020-07-17 17:09:04,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-17 17:09:04,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:09:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-17 17:09:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5254, Unknown=0, NotChecked=0, Total=5402 [2020-07-17 17:09:04,315 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 74 states. [2020-07-17 17:09:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:09:18,859 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2020-07-17 17:09:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-07-17 17:09:18,860 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 309 [2020-07-17 17:09:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:09:18,862 INFO L225 Difference]: With dead ends: 362 [2020-07-17 17:09:18,862 INFO L226 Difference]: Without dead ends: 355 [2020-07-17 17:09:18,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5349 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=648, Invalid=29454, Unknown=0, NotChecked=0, Total=30102 [2020-07-17 17:09:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-17 17:09:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 198. [2020-07-17 17:09:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-17 17:09:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2020-07-17 17:09:19,136 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 309 [2020-07-17 17:09:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:09:19,136 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2020-07-17 17:09:19,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-17 17:09:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2020-07-17 17:09:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-17 17:09:19,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:09:19,139 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:09:19,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-17 17:09:19,139 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:09:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:09:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash -953467180, now seen corresponding path program 16 times [2020-07-17 17:09:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:09:19,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390317558] [2020-07-17 17:09:19,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:09:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,350 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 16 [2020-07-17 17:09:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-17 17:09:27,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390317558] [2020-07-17 17:09:27,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:09:27,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-07-17 17:09:27,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750095388] [2020-07-17 17:09:27,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-17 17:09:27,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:09:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-17 17:09:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 17:09:27,316 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand 75 states. [2020-07-17 17:09:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:09:43,234 INFO L93 Difference]: Finished difference Result 372 states and 374 transitions. [2020-07-17 17:09:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-07-17 17:09:43,235 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 318 [2020-07-17 17:09:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:09:43,238 INFO L225 Difference]: With dead ends: 372 [2020-07-17 17:09:43,238 INFO L226 Difference]: Without dead ends: 365 [2020-07-17 17:09:43,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=661, Invalid=30845, Unknown=0, NotChecked=0, Total=31506 [2020-07-17 17:09:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-07-17 17:09:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 203. [2020-07-17 17:09:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-17 17:09:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-07-17 17:09:43,431 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 318 [2020-07-17 17:09:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:09:43,432 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-07-17 17:09:43,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-17 17:09:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-07-17 17:09:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-17 17:09:43,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:09:43,434 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:09:43,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-17 17:09:43,434 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:09:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:09:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash 661506653, now seen corresponding path program 17 times [2020-07-17 17:09:43,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:09:43,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827982563] [2020-07-17 17:09:43,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:09:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:43,728 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:09:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:09:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2533 backedges. 0 proven. 1394 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-17 17:09:52,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827982563] [2020-07-17 17:09:52,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:09:52,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-07-17 17:09:52,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801851361] [2020-07-17 17:09:52,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-17 17:09:52,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:09:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-17 17:09:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=5850, Unknown=0, NotChecked=0, Total=6006 [2020-07-17 17:09:52,763 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 78 states. [2020-07-17 17:10:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:10:10,139 INFO L93 Difference]: Finished difference Result 382 states and 384 transitions. [2020-07-17 17:10:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-07-17 17:10:10,140 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 327 [2020-07-17 17:10:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:10:10,143 INFO L225 Difference]: With dead ends: 382 [2020-07-17 17:10:10,143 INFO L226 Difference]: Without dead ends: 375 [2020-07-17 17:10:10,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5988 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=686, Invalid=32986, Unknown=0, NotChecked=0, Total=33672 [2020-07-17 17:10:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-07-17 17:10:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 208. [2020-07-17 17:10:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-17 17:10:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2020-07-17 17:10:10,437 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 327 [2020-07-17 17:10:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:10:10,438 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2020-07-17 17:10:10,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-17 17:10:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2020-07-17 17:10:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 17:10:10,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:10:10,440 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:10:10,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-17 17:10:10,441 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:10:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:10:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 318181912, now seen corresponding path program 17 times [2020-07-17 17:10:10,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:10:10,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392709530] [2020-07-17 17:10:10,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:10:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:10,737 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 19 [2020-07-17 17:10:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2686 backedges. 0 proven. 1479 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-17 17:10:20,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392709530] [2020-07-17 17:10:20,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:10:20,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-07-17 17:10:20,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327223448] [2020-07-17 17:10:20,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-17 17:10:20,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:10:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-17 17:10:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6160, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 17:10:20,298 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 80 states. [2020-07-17 17:10:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:10:39,562 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2020-07-17 17:10:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-07-17 17:10:39,562 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 336 [2020-07-17 17:10:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:10:39,564 INFO L225 Difference]: With dead ends: 392 [2020-07-17 17:10:39,564 INFO L226 Difference]: Without dead ends: 385 [2020-07-17 17:10:39,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6321 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=705, Invalid=34827, Unknown=0, NotChecked=0, Total=35532 [2020-07-17 17:10:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-07-17 17:10:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2020-07-17 17:10:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-17 17:10:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2020-07-17 17:10:39,794 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 336 [2020-07-17 17:10:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:10:39,795 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2020-07-17 17:10:39,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-17 17:10:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2020-07-17 17:10:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-17 17:10:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:10:39,797 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:10:39,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-17 17:10:39,798 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:10:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:10:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash -943565995, now seen corresponding path program 18 times [2020-07-17 17:10:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:10:39,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910952883] [2020-07-17 17:10:39,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:10:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,093 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:10:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:10:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1566 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-17 17:10:50,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910952883] [2020-07-17 17:10:50,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:10:50,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-07-17 17:10:50,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898212640] [2020-07-17 17:10:50,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-07-17 17:10:50,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:10:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-07-17 17:10:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6478, Unknown=0, NotChecked=0, Total=6642 [2020-07-17 17:10:50,772 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 82 states. [2020-07-17 17:11:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:11:12,775 INFO L93 Difference]: Finished difference Result 402 states and 404 transitions. [2020-07-17 17:11:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-07-17 17:11:12,776 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 345 [2020-07-17 17:11:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:11:12,778 INFO L225 Difference]: With dead ends: 402 [2020-07-17 17:11:12,778 INFO L226 Difference]: Without dead ends: 395 [2020-07-17 17:11:12,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=724, Invalid=36718, Unknown=0, NotChecked=0, Total=37442 [2020-07-17 17:11:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-17 17:11:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2020-07-17 17:11:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-17 17:11:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2020-07-17 17:11:13,205 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 345 [2020-07-17 17:11:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:11:13,205 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2020-07-17 17:11:13,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-07-17 17:11:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2020-07-17 17:11:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-17 17:11:13,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:11:13,209 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:11:13,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-17 17:11:13,209 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:11:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:11:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1845228252, now seen corresponding path program 18 times [2020-07-17 17:11:13,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:11:13,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436225468] [2020-07-17 17:11:13,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:11:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:13,574 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-07-17 17:11:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 1656 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-17 17:11:26,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436225468] [2020-07-17 17:11:26,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:11:26,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-07-17 17:11:26,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498658640] [2020-07-17 17:11:26,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-17 17:11:26,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:11:26,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-17 17:11:26,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 17:11:26,405 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand 84 states. [2020-07-17 17:11:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:11:53,758 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-07-17 17:11:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-07-17 17:11:53,759 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 354 [2020-07-17 17:11:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:11:53,761 INFO L225 Difference]: With dead ends: 412 [2020-07-17 17:11:53,761 INFO L226 Difference]: Without dead ends: 405 [2020-07-17 17:11:53,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6938 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=748, Invalid=39052, Unknown=0, NotChecked=0, Total=39800 [2020-07-17 17:11:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-07-17 17:11:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 223. [2020-07-17 17:11:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-17 17:11:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2020-07-17 17:11:54,226 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 354 [2020-07-17 17:11:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:11:54,227 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2020-07-17 17:11:54,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-17 17:11:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2020-07-17 17:11:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-07-17 17:11:54,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:11:54,230 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:11:54,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-17 17:11:54,230 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:11:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:11:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 592020429, now seen corresponding path program 19 times [2020-07-17 17:11:54,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:11:54,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833217445] [2020-07-17 17:11:54,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:11:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:54,632 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:11:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:11:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3173 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-17 17:12:07,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833217445] [2020-07-17 17:12:07,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:12:07,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-07-17 17:12:07,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945675830] [2020-07-17 17:12:07,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-17 17:12:07,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:12:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-17 17:12:07,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7138, Unknown=0, NotChecked=0, Total=7310 [2020-07-17 17:12:07,683 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 86 states. [2020-07-17 17:12:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:12:36,632 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2020-07-17 17:12:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-07-17 17:12:36,634 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 363 [2020-07-17 17:12:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:12:36,636 INFO L225 Difference]: With dead ends: 422 [2020-07-17 17:12:36,636 INFO L226 Difference]: Without dead ends: 415 [2020-07-17 17:12:36,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7374 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=762, Invalid=40650, Unknown=0, NotChecked=0, Total=41412 [2020-07-17 17:12:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-07-17 17:12:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 228. [2020-07-17 17:12:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-17 17:12:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2020-07-17 17:12:36,984 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 363 [2020-07-17 17:12:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:12:36,985 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2020-07-17 17:12:36,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-17 17:12:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2020-07-17 17:12:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-07-17 17:12:36,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:12:36,988 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:12:36,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-17 17:12:36,988 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:12:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:12:36,989 INFO L82 PathProgramCache]: Analyzing trace with hash -844668640, now seen corresponding path program 19 times [2020-07-17 17:12:36,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:12:36,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677889070] [2020-07-17 17:12:36,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:12:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,338 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-07-17 17:12:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:12:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 1843 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-17 17:12:52,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677889070] [2020-07-17 17:12:52,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:12:52,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-07-17 17:12:52,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609693470] [2020-07-17 17:12:52,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-17 17:12:52,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:12:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-17 17:12:52,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 17:12:52,336 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand 88 states. [2020-07-17 17:13:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:13:25,498 INFO L93 Difference]: Finished difference Result 432 states and 434 transitions. [2020-07-17 17:13:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-07-17 17:13:25,499 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 372 [2020-07-17 17:13:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:13:25,501 INFO L225 Difference]: With dead ends: 432 [2020-07-17 17:13:25,501 INFO L226 Difference]: Without dead ends: 425 [2020-07-17 17:13:25,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7663 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=786, Invalid=43104, Unknown=0, NotChecked=0, Total=43890 [2020-07-17 17:13:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-07-17 17:13:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 233. [2020-07-17 17:13:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-17 17:13:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2020-07-17 17:13:25,798 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 372 [2020-07-17 17:13:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:13:25,798 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2020-07-17 17:13:25,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-17 17:13:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2020-07-17 17:13:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-17 17:13:25,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:13:25,801 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:13:25,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-17 17:13:25,802 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:13:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:13:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash 530815941, now seen corresponding path program 20 times [2020-07-17 17:13:25,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:13:25,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260430809] [2020-07-17 17:13:25,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:13:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,078 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-17 17:13:26,270 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:13:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:13:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3520 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-17 17:13:41,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260430809] [2020-07-17 17:13:41,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:13:41,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-07-17 17:13:41,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213674878] [2020-07-17 17:13:41,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-17 17:13:41,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:13:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-17 17:13:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=7830, Unknown=0, NotChecked=0, Total=8010 [2020-07-17 17:13:41,730 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand 90 states. [2020-07-17 17:14:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:14:19,565 INFO L93 Difference]: Finished difference Result 442 states and 444 transitions. [2020-07-17 17:14:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-07-17 17:14:19,569 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 381 [2020-07-17 17:14:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:14:19,572 INFO L225 Difference]: With dead ends: 442 [2020-07-17 17:14:19,572 INFO L226 Difference]: Without dead ends: 435 [2020-07-17 17:14:19,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8121 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=800, Invalid=44782, Unknown=0, NotChecked=0, Total=45582 [2020-07-17 17:14:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-07-17 17:14:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 238. [2020-07-17 17:14:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-17 17:14:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-07-17 17:14:19,911 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 381 [2020-07-17 17:14:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:14:19,912 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-07-17 17:14:19,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-17 17:14:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-07-17 17:14:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-17 17:14:19,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:14:19,915 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:14:19,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-17 17:14:19,915 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:14:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:14:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1898896612, now seen corresponding path program 20 times [2020-07-17 17:14:19,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:14:19,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395972077] [2020-07-17 17:14:19,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:14:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:20,294 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 17 [2020-07-17 17:14:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:14:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 0 proven. 2040 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2020-07-17 17:14:39,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395972077] [2020-07-17 17:14:39,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:14:39,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-07-17 17:14:39,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948445148] [2020-07-17 17:14:39,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-17 17:14:39,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:14:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-17 17:14:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 17:14:39,851 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 91 states. [2020-07-17 17:15:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:15:26,761 INFO L93 Difference]: Finished difference Result 452 states and 454 transitions. [2020-07-17 17:15:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-07-17 17:15:26,762 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 390 [2020-07-17 17:15:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:15:26,764 INFO L225 Difference]: With dead ends: 452 [2020-07-17 17:15:26,764 INFO L226 Difference]: Without dead ends: 445 [2020-07-17 17:15:26,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8084 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=813, Invalid=46493, Unknown=0, NotChecked=0, Total=47306 [2020-07-17 17:15:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-07-17 17:15:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 243. [2020-07-17 17:15:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-17 17:15:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2020-07-17 17:15:27,109 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 390 [2020-07-17 17:15:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:15:27,110 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2020-07-17 17:15:27,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-17 17:15:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2020-07-17 17:15:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-07-17 17:15:27,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:15:27,120 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:15:27,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-17 17:15:27,120 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:15:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:15:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash -277292227, now seen corresponding path program 21 times [2020-07-17 17:15:27,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:15:27,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230022965] [2020-07-17 17:15:27,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:15:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:27,397 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-17 17:15:27,613 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 17 [2020-07-17 17:15:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:15:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3885 backedges. 0 proven. 2142 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2020-07-17 17:15:50,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230022965] [2020-07-17 17:15:50,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:15:50,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-07-17 17:15:50,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088536315] [2020-07-17 17:15:50,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-07-17 17:15:50,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:15:50,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-07-17 17:15:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8554, Unknown=0, NotChecked=0, Total=8742 [2020-07-17 17:15:50,363 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand 94 states. [2020-07-17 17:16:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:16:46,533 INFO L93 Difference]: Finished difference Result 462 states and 464 transitions. [2020-07-17 17:16:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-07-17 17:16:46,536 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 399 [2020-07-17 17:16:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:16:46,539 INFO L225 Difference]: With dead ends: 462 [2020-07-17 17:16:46,539 INFO L226 Difference]: Without dead ends: 455 [2020-07-17 17:16:46,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8904 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=838, Invalid=49114, Unknown=0, NotChecked=0, Total=49952 [2020-07-17 17:16:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-07-17 17:16:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 248. [2020-07-17 17:16:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-17 17:16:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2020-07-17 17:16:46,940 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 399 [2020-07-17 17:16:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:16:46,940 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2020-07-17 17:16:46,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-07-17 17:16:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2020-07-17 17:16:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-07-17 17:16:46,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:16:46,943 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:16:46,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-17 17:16:46,943 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:16:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:16:46,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1838147112, now seen corresponding path program 21 times [2020-07-17 17:16:46,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:16:46,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967010255] [2020-07-17 17:16:46,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:16:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:47,362 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2020-07-17 17:16:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:16:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:17:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4074 backedges. 0 proven. 2247 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2020-07-17 17:17:15,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967010255] [2020-07-17 17:17:15,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:17:15,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-07-17 17:17:15,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912230262] [2020-07-17 17:17:15,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-17 17:17:15,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:17:15,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-17 17:17:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8742, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 17:17:15,369 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand 95 states.