/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:51:27,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:51:27,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:51:27,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:51:27,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:51:27,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:51:27,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:51:27,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:51:27,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:51:27,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:51:27,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:51:27,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:51:27,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:51:27,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:51:27,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:51:27,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:51:27,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:51:27,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:51:27,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:51:27,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:51:27,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:51:27,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:51:27,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:51:27,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:51:27,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:51:27,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:51:27,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:51:27,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:51:27,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:51:27,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:51:27,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:51:27,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:51:27,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:51:27,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:51:27,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:51:27,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:51:27,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:51:27,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:51:27,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:51:27,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:51:27,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:51:27,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:51:27,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:51:27,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:51:27,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:51:27,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:51:27,114 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:51:27,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:51:27,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:51:27,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:51:27,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:51:27,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:51:27,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:51:27,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:51:27,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:51:27,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:51:27,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:51:27,116 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:51:27,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:51:27,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:51:27,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:51:27,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:51:27,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:51:27,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:27,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:51:27,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:51:27,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:51:27,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:51:27,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:51:27,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:51:27,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:51:27,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:51:27,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:51:27,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:51:27,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:51:27,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:51:27,622 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:51:27,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-24 21:51:27,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d616836ef/ae6c7efa9b75469db01bcfcf928143f2/FLAG293fc82a7 [2020-09-24 21:51:28,221 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:51:28,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-24 21:51:28,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d616836ef/ae6c7efa9b75469db01bcfcf928143f2/FLAG293fc82a7 [2020-09-24 21:51:28,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d616836ef/ae6c7efa9b75469db01bcfcf928143f2 [2020-09-24 21:51:28,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:51:28,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:51:28,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:28,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:51:28,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:51:28,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:28,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28, skipping insertion in model container [2020-09-24 21:51:28,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:28,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:51:28,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:51:28,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:28,908 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:51:28,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:28,945 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:51:28,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28 WrapperNode [2020-09-24 21:51:28,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:28,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:51:28,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:51:28,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:51:28,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:28,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... [2020-09-24 21:51:29,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:51:29,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:51:29,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:51:29,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:51:29,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 21:51:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:51:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:51:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:51:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:51:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:51:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:51:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:51:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:51:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:51:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:51:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:51:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:51:29,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:51:29,449 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 21:51:29,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:29 BoogieIcfgContainer [2020-09-24 21:51:29,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:51:29,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:51:29,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:51:29,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:51:29,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:51:28" (1/3) ... [2020-09-24 21:51:29,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f300a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:29, skipping insertion in model container [2020-09-24 21:51:29,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:28" (2/3) ... [2020-09-24 21:51:29,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f300a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:29, skipping insertion in model container [2020-09-24 21:51:29,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:29" (3/3) ... [2020-09-24 21:51:29,469 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-09-24 21:51:29,488 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:51:29,510 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:51:29,542 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:51:29,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:51:29,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:51:29,580 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:51:29,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:51:29,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:51:29,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:51:29,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:51:29,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:51:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-09-24 21:51:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 21:51:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:29,624 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, 1, 1, 1, 1] [2020-09-24 21:51:29,625 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash -980226087, now seen corresponding path program 1 times [2020-09-24 21:51:29,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:29,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183391037] [2020-09-24 21:51:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:29,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:29,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:30,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:30,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:51:30,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:51:30,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-09-24 21:51:30,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:51:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:51:30,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:51:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:31,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:31,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:31,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:31,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:51:31,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:31,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:31,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:31,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183391037] [2020-09-24 21:51:31,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:31,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 21:51:31,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743940489] [2020-09-24 21:51:31,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:51:31,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:51:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:51:31,216 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 9 states. [2020-09-24 21:51:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:32,010 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-09-24 21:51:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:51:32,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-24 21:51:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:32,034 INFO L225 Difference]: With dead ends: 112 [2020-09-24 21:51:32,035 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 21:51:32,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:51:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 21:51:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-24 21:51:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 21:51:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-09-24 21:51:32,132 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 34 [2020-09-24 21:51:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:32,134 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-09-24 21:51:32,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:51:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-09-24 21:51:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 21:51:32,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:32,138 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, 1, 1] [2020-09-24 21:51:32,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:51:32,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1377800797, now seen corresponding path program 1 times [2020-09-24 21:51:32,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:32,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843765321] [2020-09-24 21:51:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:32,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:32,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:32,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:32,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:33,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:33,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:33,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 21:51:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:51:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1928 [2020-09-24 21:51:34,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:51:34,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:51:34,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:34,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:34,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:34,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:34,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:34,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:34,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:34,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843765321] [2020-09-24 21:51:34,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:34,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:51:34,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026535638] [2020-09-24 21:51:34,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:51:34,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:51:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:51:34,222 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 11 states. [2020-09-24 21:51:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:34,965 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-09-24 21:51:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:51:34,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-24 21:51:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:34,969 INFO L225 Difference]: With dead ends: 119 [2020-09-24 21:51:34,969 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 21:51:34,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:51:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 21:51:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2020-09-24 21:51:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 21:51:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-09-24 21:51:34,992 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 40 [2020-09-24 21:51:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:34,992 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-09-24 21:51:34,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:51:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-09-24 21:51:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:51:34,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:35,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:35,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:51:35,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:35,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1038172641, now seen corresponding path program 2 times [2020-09-24 21:51:35,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:35,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953048050] [2020-09-24 21:51:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:35,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:36,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:36,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:36,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:37,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:38,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:51:40,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-09-24 21:51:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:51:40,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:40,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:51:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:51:40,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:40,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:40,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:40,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:40,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:40,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:40,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953048050] [2020-09-24 21:51:40,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:40,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:51:40,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385447565] [2020-09-24 21:51:40,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:51:40,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:51:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:51:40,178 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 13 states. [2020-09-24 21:51:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:41,197 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2020-09-24 21:51:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:51:41,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-09-24 21:51:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:41,203 INFO L225 Difference]: With dead ends: 149 [2020-09-24 21:51:41,203 INFO L226 Difference]: Without dead ends: 147 [2020-09-24 21:51:41,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:51:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-24 21:51:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113. [2020-09-24 21:51:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 21:51:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-09-24 21:51:41,223 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 46 [2020-09-24 21:51:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:41,224 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-09-24 21:51:41,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:51:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-09-24 21:51:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:51:41,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:41,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:41,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:51:41,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -475110064, now seen corresponding path program 1 times [2020-09-24 21:51:41,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:41,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553179762] [2020-09-24 21:51:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:41,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:44,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:46,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:46,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:51:46,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-09-24 21:51:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:51:46,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:51:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:51:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:46,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:46,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:46,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:46,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553179762] [2020-09-24 21:51:46,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:46,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:51:46,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885878181] [2020-09-24 21:51:46,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:51:46,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:51:46,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:51:46,392 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 13 states. [2020-09-24 21:51:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:47,832 INFO L93 Difference]: Finished difference Result 190 states and 222 transitions. [2020-09-24 21:51:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 21:51:47,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-09-24 21:51:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:47,837 INFO L225 Difference]: With dead ends: 190 [2020-09-24 21:51:47,838 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 21:51:47,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=457, Invalid=1523, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 21:51:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 21:51:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 141. [2020-09-24 21:51:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 21:51:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2020-09-24 21:51:47,861 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 46 [2020-09-24 21:51:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:47,862 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2020-09-24 21:51:47,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:51:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2020-09-24 21:51:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:51:47,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:47,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:47,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:51:47,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:47,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1041907301, now seen corresponding path program 3 times [2020-09-24 21:51:47,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:47,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000404357] [2020-09-24 21:51:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:47,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:47,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:47,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:51:52,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-24 21:51:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:51:52,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:51:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 21:51:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:53,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:53,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:53,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:53,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:53,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:53,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000404357] [2020-09-24 21:51:53,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:53,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:51:53,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670203352] [2020-09-24 21:51:53,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:51:53,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:53,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:51:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:51:53,061 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand 15 states. [2020-09-24 21:51:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:54,368 INFO L93 Difference]: Finished difference Result 210 states and 246 transitions. [2020-09-24 21:51:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:51:54,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-09-24 21:51:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:54,373 INFO L225 Difference]: With dead ends: 210 [2020-09-24 21:51:54,373 INFO L226 Difference]: Without dead ends: 208 [2020-09-24 21:51:54,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:51:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-24 21:51:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 167. [2020-09-24 21:51:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 21:51:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2020-09-24 21:51:54,397 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 52 [2020-09-24 21:51:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:54,398 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2020-09-24 21:51:54,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:51:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2020-09-24 21:51:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:51:54,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:54,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:54,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:51:54,401 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash -471375404, now seen corresponding path program 2 times [2020-09-24 21:51:54,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:54,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253223327] [2020-09-24 21:51:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:59,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:51:59,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-24 21:51:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:51:59,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:51:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:51:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 21:51:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:59,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:59,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:51:59,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:59,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:59,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:59,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:59,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:59,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-24 21:51:59,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253223327] [2020-09-24 21:51:59,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:59,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:51:59,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868464883] [2020-09-24 21:51:59,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:51:59,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:51:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:59,504 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand 8 states. [2020-09-24 21:51:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:59,881 INFO L93 Difference]: Finished difference Result 265 states and 309 transitions. [2020-09-24 21:51:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:51:59,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-09-24 21:51:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:59,885 INFO L225 Difference]: With dead ends: 265 [2020-09-24 21:51:59,885 INFO L226 Difference]: Without dead ends: 263 [2020-09-24 21:51:59,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:51:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-24 21:51:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 187. [2020-09-24 21:51:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-24 21:51:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-09-24 21:51:59,910 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 52 [2020-09-24 21:51:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:59,911 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-09-24 21:51:59,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:51:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-09-24 21:51:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:51:59,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:59,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:59,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:51:59,915 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1149176483, now seen corresponding path program 1 times [2020-09-24 21:51:59,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:59,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925182595] [2020-09-24 21:51:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:59,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:04,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 21:52:04,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-09-24 21:52:04,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:52:04,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:52:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:52:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:52:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:52:05,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:05,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:05,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 21:52:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:52:05,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:05,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:52:05,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 21:52:05,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925182595] [2020-09-24 21:52:05,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:05,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:52:05,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427049100] [2020-09-24 21:52:05,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:52:05,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:52:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:52:05,058 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 11 states. [2020-09-24 21:52:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:05,833 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2020-09-24 21:52:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:52:05,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-24 21:52:05,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:05,837 INFO L225 Difference]: With dead ends: 323 [2020-09-24 21:52:05,837 INFO L226 Difference]: Without dead ends: 321 [2020-09-24 21:52:05,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:52:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-09-24 21:52:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 241. [2020-09-24 21:52:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-09-24 21:52:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2020-09-24 21:52:05,870 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 55 [2020-09-24 21:52:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:05,870 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2020-09-24 21:52:05,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:52:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2020-09-24 21:52:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 21:52:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:05,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:05,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:52:05,875 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash 72512057, now seen corresponding path program 2 times [2020-09-24 21:52:05,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:05,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979557940] [2020-09-24 21:52:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 21:52:10,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-09-24 21:52:10,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:52:10,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:52:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:52:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 21:52:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:10,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:10,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:52:10,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:10,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:10,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:52:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:52:10,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:52:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:10,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:10,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:52:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:10,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:52:10,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:52:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-24 21:52:10,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979557940] [2020-09-24 21:52:10,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:52:10,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:52:10,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226683440] [2020-09-24 21:52:10,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:52:10,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:52:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:52:10,938 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand 5 states. [2020-09-24 21:52:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:11,112 INFO L93 Difference]: Finished difference Result 408 states and 503 transitions. [2020-09-24 21:52:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:52:11,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-09-24 21:52:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:11,122 INFO L225 Difference]: With dead ends: 408 [2020-09-24 21:52:11,123 INFO L226 Difference]: Without dead ends: 195 [2020-09-24 21:52:11,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:52:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-24 21:52:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2020-09-24 21:52:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-09-24 21:52:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2020-09-24 21:52:11,145 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 64 [2020-09-24 21:52:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:11,145 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2020-09-24 21:52:11,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:52:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2020-09-24 21:52:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:52:11,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:11,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:11,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:52:11,149 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash 94098297, now seen corresponding path program 1 times [2020-09-24 21:52:11,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:11,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435894974] [2020-09-24 21:52:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:16,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:52:16,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-09-24 21:52:16,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:52:16,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:52:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 21:52:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:52:16,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:16,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:16,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:16,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 21:52:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:16,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:52:16,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:52:16,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:52:16,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435894974] [2020-09-24 21:52:16,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:16,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:52:16,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750199183] [2020-09-24 21:52:16,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:52:16,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:16,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:52:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:52:16,368 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand 16 states. [2020-09-24 21:52:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:17,205 INFO L93 Difference]: Finished difference Result 240 states and 284 transitions. [2020-09-24 21:52:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:52:17,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-24 21:52:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:17,210 INFO L225 Difference]: With dead ends: 240 [2020-09-24 21:52:17,210 INFO L226 Difference]: Without dead ends: 238 [2020-09-24 21:52:17,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:52:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-24 21:52:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 193. [2020-09-24 21:52:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-24 21:52:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2020-09-24 21:52:17,239 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 67 [2020-09-24 21:52:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:17,240 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2020-09-24 21:52:17,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:52:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2020-09-24 21:52:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 21:52:17,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:17,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:17,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:52:17,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash -262582450, now seen corresponding path program 1 times [2020-09-24 21:52:17,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:17,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186397194] [2020-09-24 21:52:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking...