/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:56:28,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:56:28,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:56:29,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:56:29,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:56:29,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:56:29,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:56:29,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:56:29,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:56:29,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:56:29,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:56:29,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:56:29,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:56:29,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:56:29,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:56:29,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:56:29,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:56:29,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:56:29,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:56:29,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:56:29,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:56:29,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:56:29,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:56:29,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:56:29,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:56:29,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:56:29,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:56:29,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:56:29,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:56:29,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:56:29,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:56:29,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:56:29,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:56:29,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:56:29,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:56:29,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:56:29,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:56:29,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:56:29,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:56:29,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:56:29,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:56:29,129 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 [2020-10-28 14:56:29,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:56:29,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:56:29,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:56:29,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:56:29,201 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:56:29,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:56:29,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:56:29,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:56:29,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:56:29,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:56:29,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:56:29,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:56:29,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:56:29,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:56:29,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:56:29,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:56:29,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:56:29,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:56:29,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:56:29,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:56:29,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:56:29,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:56:29,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:56:29,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:56:29,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:56:29,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:56:29,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:56:29,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:56:29,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:56:29,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:56:29,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:56:29,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:56:29,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:56:29,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:56:29,639 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:56:29,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-28 14:56:29,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/919e883ea/f59a7e48230643dfa8fc9f24e87b849c/FLAG21cfa6625 [2020-10-28 14:56:30,414 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:56:30,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-28 14:56:30,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/919e883ea/f59a7e48230643dfa8fc9f24e87b849c/FLAG21cfa6625 [2020-10-28 14:56:30,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/919e883ea/f59a7e48230643dfa8fc9f24e87b849c [2020-10-28 14:56:30,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:56:30,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:56:30,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:30,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:56:30,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:56:30,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:30" (1/1) ... [2020-10-28 14:56:30,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656cb8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:30, skipping insertion in model container [2020-10-28 14:56:30,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:56:30" (1/1) ... [2020-10-28 14:56:30,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:56:30,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:56:30,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:31,007 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:56:31,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:56:31,039 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:56:31,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31 WrapperNode [2020-10-28 14:56:31,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:56:31,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:56:31,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:56:31,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:56:31,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (1/1) ... [2020-10-28 14:56:31,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:56:31,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:56:31,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:56:31,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:56:31,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (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 [2020-10-28 14:56:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:56:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:56:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:56:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:56:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:56:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:56:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:56:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:56:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:56:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:56:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:56:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:56:31,609 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:56:31,609 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:56:31,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:31 BoogieIcfgContainer [2020-10-28 14:56:31,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:56:31,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:56:31,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:56:31,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:56:31,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:56:30" (1/3) ... [2020-10-28 14:56:31,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141130ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:31, skipping insertion in model container [2020-10-28 14:56:31,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:56:31" (2/3) ... [2020-10-28 14:56:31,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141130ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:56:31, skipping insertion in model container [2020-10-28 14:56:31,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:56:31" (3/3) ... [2020-10-28 14:56:31,624 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-28 14:56:31,638 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:56:31,646 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:56:31,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:56:31,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:56:31,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:56:31,714 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:56:31,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:56:31,714 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:56:31,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:56:31,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:56:31,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:56:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 14:56:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:31,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:31,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:31,740 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:31,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-28 14:56:31,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:31,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716271514] [2020-10-28 14:56:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:31,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:32,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 14:56:32,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:56:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:32,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:56:32,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:32,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:56:32,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:32,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:32,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:32,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:32,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716271514] [2020-10-28 14:56:32,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:32,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:56:32,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443870021] [2020-10-28 14:56:32,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:56:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:32,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:56:32,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:32,439 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 14:56:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:32,522 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-28 14:56:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:56:32,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:56:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:32,531 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:56:32,532 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:56:32,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:56:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:56:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:56:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:56:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 14:56:32,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 14:56:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:32,582 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 14:56:32,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:56:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 14:56:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:56:32,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:32,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:32,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:56:32,583 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1519179466, now seen corresponding path program 1 times [2020-10-28 14:56:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:32,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594061244] [2020-10-28 14:56:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:56:32,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:32,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 14:56:32,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:32,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:32,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:32,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:32,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:32,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:56:32,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:32,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:32,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:32,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594061244] [2020-10-28 14:56:32,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:32,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:32,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518320440] [2020-10-28 14:56:32,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:32,929 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 14:56:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:33,007 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 14:56:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:33,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:56:33,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:33,008 INFO L225 Difference]: With dead ends: 24 [2020-10-28 14:56:33,008 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 14:56:33,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 14:56:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-28 14:56:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 14:56:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 14:56:33,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 14:56:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:33,018 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 14:56:33,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 14:56:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:56:33,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:33,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:33,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:56:33,020 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-28 14:56:33,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:33,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550993756] [2020-10-28 14:56:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:33,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:33,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:56:33,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:33,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 14:56:33,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:33,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:33,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:56:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:33,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:33,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:33,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:33,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:33,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:56:33,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:33,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:33,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550993756] [2020-10-28 14:56:33,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:33,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:33,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303856985] [2020-10-28 14:56:33,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:33,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:33,344 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 14:56:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:33,517 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 14:56:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:33,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 14:56:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:33,519 INFO L225 Difference]: With dead ends: 27 [2020-10-28 14:56:33,519 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:56:33,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:56:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 14:56:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:56:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 14:56:33,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 14:56:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:33,530 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 14:56:33,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 14:56:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:56:33,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:33,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:33,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:56:33,532 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-28 14:56:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:33,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115703394] [2020-10-28 14:56:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:33,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:34,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:56:34,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:56:34,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:56:34,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:34,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:34,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:56:34,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:34,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:34,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:34,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:34,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:34,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:56:34,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115703394] [2020-10-28 14:56:34,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:34,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600949456] [2020-10-28 14:56:34,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:34,433 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-28 14:56:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:34,502 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-28 14:56:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:56:34,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 14:56:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:34,504 INFO L225 Difference]: With dead ends: 32 [2020-10-28 14:56:34,504 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 14:56:34,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 14:56:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 14:56:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 14:56:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 14:56:34,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-28 14:56:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:34,521 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 14:56:34,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 14:56:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:56:34,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:34,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:56:34,522 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -485019992, now seen corresponding path program 1 times [2020-10-28 14:56:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:34,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609636872] [2020-10-28 14:56:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:35,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:35,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:56:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:36,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:36,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:36,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:36,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:36,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:36,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:56:36,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609636872] [2020-10-28 14:56:36,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:36,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:56:36,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653757469] [2020-10-28 14:56:36,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:56:36,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:56:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:56:36,062 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-28 14:56:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:36,242 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:56:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:56:36,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:56:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:36,244 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:56:36,244 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:56:36,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:56:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:56:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-28 14:56:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 14:56:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 14:56:36,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-28 14:56:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:36,255 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 14:56:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:56:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 14:56:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:56:36,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:36,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:36,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:56:36,257 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2041253033, now seen corresponding path program 2 times [2020-10-28 14:56:36,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:36,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410901225] [2020-10-28 14:56:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:36,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:36,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:38,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:38,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:56:38,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2623 [2020-10-28 14:56:38,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:38,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:56:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:56:38,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:56:38,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:38,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:38,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:38,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:38,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:38,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:38,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:38,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:38,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:56:38,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410901225] [2020-10-28 14:56:38,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:38,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:56:38,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122132939] [2020-10-28 14:56:38,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:56:38,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:38,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:56:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:56:38,978 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-28 14:56:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:39,091 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-28 14:56:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:56:39,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 14:56:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:39,093 INFO L225 Difference]: With dead ends: 44 [2020-10-28 14:56:39,093 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:56:39,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:56:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:56:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:56:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-28 14:56:39,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-10-28 14:56:39,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:39,104 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-28 14:56:39,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:56:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-28 14:56:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:56:39,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:39,105 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:39,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:56:39,106 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1932759249, now seen corresponding path program 3 times [2020-10-28 14:56:39,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:39,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902599969] [2020-10-28 14:56:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:44,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:56:44,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:56:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:56:44,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:44,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:44,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:44,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:44,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:56:44,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:44,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:56:44,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902599969] [2020-10-28 14:56:44,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:44,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:56:44,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119100859] [2020-10-28 14:56:44,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:56:44,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:44,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:56:44,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:56:44,253 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-28 14:56:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:44,499 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-28 14:56:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:56:44,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 14:56:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:44,501 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:56:44,502 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:56:44,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:56:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:56:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-28 14:56:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:56:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 14:56:44,521 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2020-10-28 14:56:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 14:56:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:56:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 14:56:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:56:44,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:44,523 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:44,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:56:44,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2092150666, now seen corresponding path program 4 times [2020-10-28 14:56:44,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:44,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504070025] [2020-10-28 14:56:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:44,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:49,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:49,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:56:49,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:56:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:56:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:49,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:49,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:49,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:49,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:56:49,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504070025] [2020-10-28 14:56:49,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:49,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:56:49,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820807428] [2020-10-28 14:56:49,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:56:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:56:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:56:49,709 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-10-28 14:56:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:50,019 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 14:56:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:56:50,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-28 14:56:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:50,021 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:56:50,021 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:56:50,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:56:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:56:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 14:56:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:56:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 14:56:50,043 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-10-28 14:56:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:50,045 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 14:56:50,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:56:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 14:56:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:56:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:50,048 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:50,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:56:50,048 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -800662415, now seen corresponding path program 5 times [2020-10-28 14:56:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:50,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020302582] [2020-10-28 14:56:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:55,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:56:55,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:56:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:56:55,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:55,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:55,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:56:55,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 14:56:55,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:56:55,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:56:55,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:55,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 14:56:55,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020302582] [2020-10-28 14:56:55,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:56:55,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:56:55,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943873691] [2020-10-28 14:56:55,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:56:55,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:56:55,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:56:55,204 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-28 14:56:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:56:55,362 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-28 14:56:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:56:55,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 14:56:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:56:55,363 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:56:55,363 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:56:55,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:56:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:56:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:56:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:56:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 14:56:55,393 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 37 [2020-10-28 14:56:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:55,394 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 14:56:55,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:56:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 14:56:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:56:55,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:55,397 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:55,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:56:55,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1137089611, now seen corresponding path program 6 times [2020-10-28 14:56:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359558497] [2020-10-28 14:56:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:00,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:00,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:57:00,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:00,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:57:00,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:00,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:00,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:00,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:00,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:57:00,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:00,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:00,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:00,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:00,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:57:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359558497] [2020-10-28 14:57:00,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:00,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:00,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667359232] [2020-10-28 14:57:00,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:00,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:00,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:00,604 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2020-10-28 14:57:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:01,078 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-28 14:57:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:01,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 14:57:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:01,080 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:57:01,080 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:57:01,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:57:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-28 14:57:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:57:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-28 14:57:01,119 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 42 [2020-10-28 14:57:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:01,120 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-28 14:57:01,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-28 14:57:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:57:01,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:01,122 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:01,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:57:01,122 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1523712548, now seen corresponding path program 7 times [2020-10-28 14:57:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:01,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650264340] [2020-10-28 14:57:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:01,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:01,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:57:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 14:57:06,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:57:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:06,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:06,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:06,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:06,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 197 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-28 14:57:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650264340] [2020-10-28 14:57:06,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:06,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:57:06,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419160994] [2020-10-28 14:57:06,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:57:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:57:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:57:06,272 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 7 states. [2020-10-28 14:57:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:06,523 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-28 14:57:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:57:06,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-28 14:57:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:06,524 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:57:06,524 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:57:06,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:57:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 14:57:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 14:57:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-28 14:57:06,544 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 48 [2020-10-28 14:57:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:06,545 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-28 14:57:06,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:57:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-28 14:57:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 14:57:06,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:06,546 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:06,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:57:06,546 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1665681110, now seen corresponding path program 8 times [2020-10-28 14:57:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:06,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382013558] [2020-10-28 14:57:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:06,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:06,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:08,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:11,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:11,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:57:11,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:57:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:11,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:11,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:11,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:11,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:11,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 240 proven. 10 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-28 14:57:11,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382013558] [2020-10-28 14:57:11,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:11,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:11,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398072486] [2020-10-28 14:57:11,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:11,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:11,708 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2020-10-28 14:57:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:12,011 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2020-10-28 14:57:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:12,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-28 14:57:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:12,014 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:57:12,014 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:57:12,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:57:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 14:57:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:57:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-28 14:57:12,033 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 54 [2020-10-28 14:57:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:12,033 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-28 14:57:12,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-28 14:57:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 14:57:12,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:12,035 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:12,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:57:12,035 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash -832639004, now seen corresponding path program 9 times [2020-10-28 14:57:12,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:12,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188750051] [2020-10-28 14:57:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:12,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:57:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:57:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:57:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:57:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:57:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:17,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:17,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 339 proven. 15 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-28 14:57:17,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188750051] [2020-10-28 14:57:17,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:17,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:57:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846182993] [2020-10-28 14:57:17,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:57:17,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:17,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:57:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:57:17,228 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 9 states. [2020-10-28 14:57:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:17,600 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-28 14:57:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:57:17,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 14:57:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:17,602 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:57:17,602 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:57:17,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:57:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 14:57:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:57:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-28 14:57:17,628 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 60 [2020-10-28 14:57:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:17,628 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-28 14:57:17,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:57:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-28 14:57:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:57:17,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:17,630 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:17,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:57:17,630 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash -140658070, now seen corresponding path program 10 times [2020-10-28 14:57:17,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:17,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384973256] [2020-10-28 14:57:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:57:22,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:22,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:57:22,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:22,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:22,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:22,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:22,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:22,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:22,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:22,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:22,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:22,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 14:57:22,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384973256] [2020-10-28 14:57:22,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:22,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:57:22,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522599635] [2020-10-28 14:57:22,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:57:22,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:57:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:57:22,835 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 10 states. [2020-10-28 14:57:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:23,253 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2020-10-28 14:57:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:57:23,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-28 14:57:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:23,255 INFO L225 Difference]: With dead ends: 126 [2020-10-28 14:57:23,255 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:57:23,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:57:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:57:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 14:57:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:57:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-28 14:57:23,275 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 66 [2020-10-28 14:57:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:23,276 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-28 14:57:23,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:57:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-28 14:57:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:57:23,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:23,277 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:23,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:57:23,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1255641692, now seen corresponding path program 11 times [2020-10-28 14:57:23,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:23,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913582646] [2020-10-28 14:57:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:57:28,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:57:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:28,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:28,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:28,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 591 proven. 28 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2020-10-28 14:57:28,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913582646] [2020-10-28 14:57:28,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:28,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844048707] [2020-10-28 14:57:28,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:28,496 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 11 states. [2020-10-28 14:57:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:28,986 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2020-10-28 14:57:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:28,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-28 14:57:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:28,987 INFO L225 Difference]: With dead ends: 137 [2020-10-28 14:57:28,987 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:57:28,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:57:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 14:57:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:57:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-28 14:57:29,022 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 72 [2020-10-28 14:57:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:29,022 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-28 14:57:29,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-28 14:57:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 14:57:29,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:29,024 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:29,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:57:29,024 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2014532694, now seen corresponding path program 12 times [2020-10-28 14:57:29,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:29,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571861976] [2020-10-28 14:57:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:29,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:34,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:34,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 14:57:34,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:34,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 14:57:34,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:34,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:57:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:57:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:57:34,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:34,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:34,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:34,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:34,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:34,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:57:34,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:34,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:34,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:34,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:34,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:34,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 744 proven. 36 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-10-28 14:57:34,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571861976] [2020-10-28 14:57:34,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:34,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:57:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481661662] [2020-10-28 14:57:34,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:57:34,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:57:34,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:57:34,350 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 12 states. [2020-10-28 14:57:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:35,073 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2020-10-28 14:57:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:57:35,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-28 14:57:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:35,076 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:57:35,076 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:57:35,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:57:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 14:57:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:57:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-28 14:57:35,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 78 [2020-10-28 14:57:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:35,114 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-28 14:57:35,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:57:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-28 14:57:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 14:57:35,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:35,122 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:35,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:57:35,122 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash 766671716, now seen corresponding path program 13 times [2020-10-28 14:57:35,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:35,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354668442] [2020-10-28 14:57:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:37,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:57:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:40,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:40,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 918 proven. 45 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-28 14:57:40,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354668442] [2020-10-28 14:57:40,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:40,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:57:40,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616971956] [2020-10-28 14:57:40,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:57:40,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:57:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:40,408 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 13 states. [2020-10-28 14:57:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:41,021 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-28 14:57:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:57:41,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-28 14:57:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:41,023 INFO L225 Difference]: With dead ends: 159 [2020-10-28 14:57:41,023 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:57:41,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:57:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:57:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 14:57:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:57:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-28 14:57:41,048 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 84 [2020-10-28 14:57:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:41,049 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-28 14:57:41,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:57:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-28 14:57:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:57:41,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:41,050 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:41,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:57:41,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -404714262, now seen corresponding path program 14 times [2020-10-28 14:57:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:41,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257497389] [2020-10-28 14:57:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:41,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:42,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 14:57:42,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:42,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 14:57:42,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:42,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 14:57:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257497389] [2020-10-28 14:57:42,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:42,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:57:42,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947104854] [2020-10-28 14:57:42,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:57:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:57:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:57:42,422 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 12 states. [2020-10-28 14:57:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:43,108 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-28 14:57:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:57:43,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2020-10-28 14:57:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:43,115 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:57:43,115 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 14:57:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:57:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 14:57:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2020-10-28 14:57:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 14:57:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-28 14:57:43,151 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 90 [2020-10-28 14:57:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:43,152 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-28 14:57:43,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:57:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-28 14:57:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:57:43,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:43,154 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:43,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:57:43,154 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:43,155 INFO L82 PathProgramCache]: Analyzing trace with hash -216654063, now seen corresponding path program 15 times [2020-10-28 14:57:43,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:43,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348583516] [2020-10-28 14:57:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:43,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 14:57:43,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:44,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:44,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:44,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-28 14:57:44,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348583516] [2020-10-28 14:57:44,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:44,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:57:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077063496] [2020-10-28 14:57:44,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:57:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:57:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:57:44,144 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 11 states. [2020-10-28 14:57:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:44,719 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2020-10-28 14:57:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:57:44,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-28 14:57:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:44,721 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:57:44,721 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:57:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:57:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:57:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-10-28 14:57:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:57:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-28 14:57:44,749 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 103 [2020-10-28 14:57:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:44,749 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-28 14:57:44,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:57:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-28 14:57:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 14:57:44,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:44,751 INFO L422 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:44,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:57:44,751 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1808237642, now seen corresponding path program 16 times [2020-10-28 14:57:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:44,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160913750] [2020-10-28 14:57:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:44,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:45,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 14:57:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:45,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:45,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:45,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:45,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-28 14:57:46,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160913750] [2020-10-28 14:57:46,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:46,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:57:46,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886881887] [2020-10-28 14:57:46,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:57:46,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:57:46,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:57:46,024 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 14 states. [2020-10-28 14:57:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:46,889 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-28 14:57:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:57:46,890 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 116 [2020-10-28 14:57:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:46,893 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:57:46,893 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:57:46,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:57:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:57:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2020-10-28 14:57:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 14:57:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2020-10-28 14:57:46,928 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 116 [2020-10-28 14:57:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:46,929 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2020-10-28 14:57:46,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:57:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2020-10-28 14:57:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 14:57:46,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:46,930 INFO L422 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:46,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:57:46,931 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 631514033, now seen corresponding path program 17 times [2020-10-28 14:57:46,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:46,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518643081] [2020-10-28 14:57:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 14:57:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:48,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:48,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:57:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-28 14:57:48,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518643081] [2020-10-28 14:57:48,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:48,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:57:48,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596745454] [2020-10-28 14:57:48,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:57:48,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:57:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:48,547 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand 13 states. [2020-10-28 14:57:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:49,409 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-28 14:57:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:57:49,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 129 [2020-10-28 14:57:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:49,411 INFO L225 Difference]: With dead ends: 161 [2020-10-28 14:57:49,411 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 14:57:49,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:57:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 14:57:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2020-10-28 14:57:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 14:57:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2020-10-28 14:57:49,458 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 129 [2020-10-28 14:57:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:49,458 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2020-10-28 14:57:49,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:57:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2020-10-28 14:57:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 14:57:49,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:49,460 INFO L422 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:49,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:57:49,461 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -239205462, now seen corresponding path program 18 times [2020-10-28 14:57:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:49,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511000844] [2020-10-28 14:57:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:50,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:51,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:51,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 14:57:51,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:51,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-28 14:57:51,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:51,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:51,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:57:51,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:51,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 14:57:51,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:51,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-28 14:57:51,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511000844] [2020-10-28 14:57:51,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:51,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:57:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592890582] [2020-10-28 14:57:51,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:57:51,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:57:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:57:51,605 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand 16 states. [2020-10-28 14:57:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:52,836 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2020-10-28 14:57:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:57:52,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 142 [2020-10-28 14:57:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:52,840 INFO L225 Difference]: With dead ends: 174 [2020-10-28 14:57:52,840 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 14:57:52,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:57:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 14:57:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2020-10-28 14:57:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:57:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-10-28 14:57:52,885 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 142 [2020-10-28 14:57:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:52,886 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-10-28 14:57:52,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:57:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-10-28 14:57:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 14:57:52,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:52,888 INFO L422 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:52,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:57:52,888 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash 966762577, now seen corresponding path program 19 times [2020-10-28 14:57:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:52,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201457124] [2020-10-28 14:57:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:52,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:54,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-28 14:57:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:54,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:54,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:54,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-28 14:57:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201457124] [2020-10-28 14:57:54,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:54,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:57:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470718180] [2020-10-28 14:57:54,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:57:54,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:57:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:57:54,438 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 15 states. [2020-10-28 14:57:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:55,563 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2020-10-28 14:57:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:57:55,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 155 [2020-10-28 14:57:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:55,566 INFO L225 Difference]: With dead ends: 187 [2020-10-28 14:57:55,566 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 14:57:55,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:57:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 14:57:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2020-10-28 14:57:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:57:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-28 14:57:55,606 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 155 [2020-10-28 14:57:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:55,607 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-28 14:57:55,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:57:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-28 14:57:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 14:57:55,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:55,609 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:55,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:57:55,609 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 20 times [2020-10-28 14:57:55,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:55,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145911384] [2020-10-28 14:57:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:55,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:57:57,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:57,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 14:57:57,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:57,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:57,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:57,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:57,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:57:57,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:57,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:57,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:57,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:57,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:57,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-28 14:57:57,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145911384] [2020-10-28 14:57:57,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:57,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:57:57,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563350224] [2020-10-28 14:57:57,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:57:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:57:57,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:57:57,794 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 18 states. [2020-10-28 14:57:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:59,309 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-28 14:57:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:57:59,309 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 168 [2020-10-28 14:57:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:59,310 INFO L225 Difference]: With dead ends: 200 [2020-10-28 14:57:59,310 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 14:57:59,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:57:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 14:57:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 182. [2020-10-28 14:57:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 14:57:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2020-10-28 14:57:59,356 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 168 [2020-10-28 14:57:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:59,357 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2020-10-28 14:57:59,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:57:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2020-10-28 14:57:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 14:57:59,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:59,358 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:59,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:57:59,359 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash 279090417, now seen corresponding path program 21 times [2020-10-28 14:57:59,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:59,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157913515] [2020-10-28 14:57:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:59,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1689 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-28 14:58:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:01,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:01,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-28 14:58:01,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157913515] [2020-10-28 14:58:01,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:01,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:58:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592332637] [2020-10-28 14:58:01,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:58:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:58:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:58:01,532 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand 17 states. [2020-10-28 14:58:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:02,993 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-28 14:58:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:58:02,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 181 [2020-10-28 14:58:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:02,996 INFO L225 Difference]: With dead ends: 213 [2020-10-28 14:58:02,996 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 14:58:02,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:58:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 14:58:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-28 14:58:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 14:58:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-28 14:58:03,045 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 181 [2020-10-28 14:58:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:03,046 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-28 14:58:03,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:58:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-28 14:58:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-28 14:58:03,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:03,047 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:03,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:58:03,047 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 22 times [2020-10-28 14:58:03,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:03,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908018441] [2020-10-28 14:58:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:03,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:04,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:06,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:06,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 14:58:06,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:06,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3392 [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-28 14:58:06,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:07,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:07,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:07,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:58:07,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:07,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:07,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-28 14:58:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908018441] [2020-10-28 14:58:07,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:07,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:58:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87737989] [2020-10-28 14:58:07,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:58:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:58:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:58:07,194 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 20 states. [2020-10-28 14:58:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:09,094 INFO L93 Difference]: Finished difference Result 226 states and 242 transitions. [2020-10-28 14:58:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:58:09,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 194 [2020-10-28 14:58:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:09,096 INFO L225 Difference]: With dead ends: 226 [2020-10-28 14:58:09,096 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 14:58:09,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:58:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 14:58:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2020-10-28 14:58:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 14:58:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2020-10-28 14:58:09,165 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 194 [2020-10-28 14:58:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:09,166 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2020-10-28 14:58:09,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:58:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2020-10-28 14:58:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-28 14:58:09,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:09,168 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:09,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:58:09,168 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1606877585, now seen corresponding path program 23 times [2020-10-28 14:58:09,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:09,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103258413] [2020-10-28 14:58:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:09,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:11,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-28 14:58:11,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:12,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:12,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:12,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-28 14:58:12,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103258413] [2020-10-28 14:58:12,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:12,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:58:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866708456] [2020-10-28 14:58:12,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:58:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:58:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:58:12,268 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand 19 states. [2020-10-28 14:58:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:13,969 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-28 14:58:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:58:13,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-28 14:58:13,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:13,973 INFO L225 Difference]: With dead ends: 239 [2020-10-28 14:58:13,973 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 14:58:13,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:58:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 14:58:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-28 14:58:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 14:58:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-28 14:58:14,029 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 207 [2020-10-28 14:58:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:14,030 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-28 14:58:14,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:58:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-28 14:58:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 14:58:14,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:14,031 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:14,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:58:14,031 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:14,031 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 24 times [2020-10-28 14:58:14,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:14,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683039789] [2020-10-28 14:58:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3210 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-28 14:58:17,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:17,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:17,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:17,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-28 14:58:17,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683039789] [2020-10-28 14:58:17,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:17,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:58:17,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128676103] [2020-10-28 14:58:17,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:58:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:17,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:58:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:58:17,926 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 22 states. [2020-10-28 14:58:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:19,985 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-10-28 14:58:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:58:19,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2020-10-28 14:58:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:19,988 INFO L225 Difference]: With dead ends: 252 [2020-10-28 14:58:19,988 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 14:58:19,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:58:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 14:58:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2020-10-28 14:58:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 14:58:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 251 transitions. [2020-10-28 14:58:20,084 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 251 transitions. Word has length 220 [2020-10-28 14:58:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:20,085 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 251 transitions. [2020-10-28 14:58:20,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:58:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 251 transitions. [2020-10-28 14:58:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-28 14:58:20,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:20,087 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:20,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:58:20,087 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:20,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1336337969, now seen corresponding path program 25 times [2020-10-28 14:58:20,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:20,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106180509] [2020-10-28 14:58:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3368 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-28 14:58:23,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:24,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:24,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-28 14:58:24,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106180509] [2020-10-28 14:58:24,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:24,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:58:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723744422] [2020-10-28 14:58:24,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:58:24,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:24,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:58:24,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:58:24,175 INFO L87 Difference]: Start difference. First operand 234 states and 251 transitions. Second operand 21 states. [2020-10-28 14:58:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:26,194 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-28 14:58:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:58:26,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 233 [2020-10-28 14:58:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:26,197 INFO L225 Difference]: With dead ends: 265 [2020-10-28 14:58:26,197 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 14:58:26,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:58:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 14:58:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-28 14:58:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 14:58:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-28 14:58:26,260 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 233 [2020-10-28 14:58:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:26,261 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-28 14:58:26,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:58:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-28 14:58:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-28 14:58:26,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:26,262 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:26,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:58:26,263 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 26 times [2020-10-28 14:58:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:26,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654258199] [2020-10-28 14:58:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:31,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:31,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-28 14:58:31,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 14:58:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:32,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:32,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:32,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:32,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:32,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:32,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:32,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:32,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:32,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:32,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:32,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:32,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-28 14:58:32,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654258199] [2020-10-28 14:58:32,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:32,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:58:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167396640] [2020-10-28 14:58:32,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:58:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:58:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:58:32,200 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 24 states. [2020-10-28 14:58:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:34,729 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2020-10-28 14:58:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:58:34,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2020-10-28 14:58:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:34,735 INFO L225 Difference]: With dead ends: 278 [2020-10-28 14:58:34,735 INFO L226 Difference]: Without dead ends: 272 [2020-10-28 14:58:34,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:58:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-28 14:58:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2020-10-28 14:58:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 14:58:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 279 transitions. [2020-10-28 14:58:34,800 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 279 transitions. Word has length 246 [2020-10-28 14:58:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:34,800 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 279 transitions. [2020-10-28 14:58:34,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:58:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 279 transitions. [2020-10-28 14:58:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 14:58:34,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:34,802 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:34,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:58:34,803 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash 475808465, now seen corresponding path program 27 times [2020-10-28 14:58:34,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:34,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400937013] [2020-10-28 14:58:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:34,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:39,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4270 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-28 14:58:39,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:39,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:39,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-28 14:58:39,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400937013] [2020-10-28 14:58:39,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:39,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:58:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7907140] [2020-10-28 14:58:39,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:58:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:58:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:58:39,889 INFO L87 Difference]: Start difference. First operand 260 states and 279 transitions. Second operand 23 states. [2020-10-28 14:58:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:42,280 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-28 14:58:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:58:42,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 259 [2020-10-28 14:58:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:42,282 INFO L225 Difference]: With dead ends: 291 [2020-10-28 14:58:42,282 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 14:58:42,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:58:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 14:58:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-28 14:58:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-28 14:58:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-28 14:58:42,356 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 259 [2020-10-28 14:58:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:42,357 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-28 14:58:42,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:58:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-28 14:58:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-28 14:58:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:42,358 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:42,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:58:42,358 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 28 times [2020-10-28 14:58:42,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:42,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794852094] [2020-10-28 14:58:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:42,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:47,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-28 14:58:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:48,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:48,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-28 14:58:48,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794852094] [2020-10-28 14:58:48,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:48,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:58:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782731975] [2020-10-28 14:58:48,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:58:48,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:58:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:58:48,402 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 26 states. [2020-10-28 14:58:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:51,574 INFO L93 Difference]: Finished difference Result 304 states and 326 transitions. [2020-10-28 14:58:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:58:51,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 272 [2020-10-28 14:58:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:51,577 INFO L225 Difference]: With dead ends: 304 [2020-10-28 14:58:51,577 INFO L226 Difference]: Without dead ends: 298 [2020-10-28 14:58:51,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:58:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-28 14:58:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2020-10-28 14:58:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-28 14:58:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 307 transitions. [2020-10-28 14:58:51,691 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 307 transitions. Word has length 272 [2020-10-28 14:58:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:51,692 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 307 transitions. [2020-10-28 14:58:51,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:58:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 307 transitions. [2020-10-28 14:58:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-28 14:58:51,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:51,694 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:51,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:58:51,695 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1249831055, now seen corresponding path program 29 times [2020-10-28 14:58:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:51,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151462371] [2020-10-28 14:58:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:56,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:58:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:56,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-28 14:58:56,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:57,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:57,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:57,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:57,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-28 14:58:57,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151462371] [2020-10-28 14:58:57,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:57,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:58:57,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108568205] [2020-10-28 14:58:57,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:58:57,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:58:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:58:57,814 INFO L87 Difference]: Start difference. First operand 286 states and 307 transitions. Second operand 25 states. [2020-10-28 14:59:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:00,746 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-28 14:59:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:59:00,747 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 285 [2020-10-28 14:59:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:00,749 INFO L225 Difference]: With dead ends: 317 [2020-10-28 14:59:00,750 INFO L226 Difference]: Without dead ends: 311 [2020-10-28 14:59:00,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 14:59:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-28 14:59:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-28 14:59:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-28 14:59:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-28 14:59:00,890 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 285 [2020-10-28 14:59:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:00,891 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-28 14:59:00,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:59:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-28 14:59:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-28 14:59:00,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:00,894 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:00,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:59:00,894 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 30 times [2020-10-28 14:59:00,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:00,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449401574] [2020-10-28 14:59:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:01,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:06,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:06,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-28 14:59:06,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-28 14:59:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:06,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:06,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:06,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-28 14:59:07,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449401574] [2020-10-28 14:59:07,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:07,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:59:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110057334] [2020-10-28 14:59:07,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:59:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:59:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:59:07,142 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 28 states. [2020-10-28 14:59:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:10,804 INFO L93 Difference]: Finished difference Result 330 states and 354 transitions. [2020-10-28 14:59:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:59:10,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 298 [2020-10-28 14:59:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:10,806 INFO L225 Difference]: With dead ends: 330 [2020-10-28 14:59:10,806 INFO L226 Difference]: Without dead ends: 324 [2020-10-28 14:59:10,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:59:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-28 14:59:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2020-10-28 14:59:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-28 14:59:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 335 transitions. [2020-10-28 14:59:10,890 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 335 transitions. Word has length 298 [2020-10-28 14:59:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:10,890 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 335 transitions. [2020-10-28 14:59:10,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:59:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 335 transitions. [2020-10-28 14:59:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-28 14:59:10,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:10,892 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:10,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:59:10,893 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1580164113, now seen corresponding path program 31 times [2020-10-28 14:59:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:10,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856334617] [2020-10-28 14:59:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-28 14:59:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:16,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:16,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-28 14:59:17,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856334617] [2020-10-28 14:59:17,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:17,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 14:59:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984586622] [2020-10-28 14:59:17,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 14:59:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 14:59:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:59:17,073 INFO L87 Difference]: Start difference. First operand 312 states and 335 transitions. Second operand 27 states. [2020-10-28 14:59:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:20,529 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-28 14:59:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:59:20,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 311 [2020-10-28 14:59:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:20,531 INFO L225 Difference]: With dead ends: 343 [2020-10-28 14:59:20,532 INFO L226 Difference]: Without dead ends: 337 [2020-10-28 14:59:20,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 14:59:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-28 14:59:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-28 14:59:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-28 14:59:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-28 14:59:20,638 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 311 [2020-10-28 14:59:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:20,638 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-28 14:59:20,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 14:59:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-28 14:59:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-28 14:59:20,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:20,641 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:20,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:59:20,641 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:20,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 32 times [2020-10-28 14:59:20,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:20,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630959116] [2020-10-28 14:59:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 14:59:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:25,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-28 14:59:25,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:26,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:26,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-28 14:59:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630959116] [2020-10-28 14:59:26,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:26,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 14:59:26,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11904756] [2020-10-28 14:59:26,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 14:59:26,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 14:59:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:59:26,892 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-28 14:59:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:30,535 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2020-10-28 14:59:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:59:30,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-28 14:59:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:30,538 INFO L225 Difference]: With dead ends: 356 [2020-10-28 14:59:30,538 INFO L226 Difference]: Without dead ends: 350 [2020-10-28 14:59:30,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:59:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-28 14:59:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 338. [2020-10-28 14:59:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-28 14:59:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 363 transitions. [2020-10-28 14:59:30,712 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 363 transitions. Word has length 324 [2020-10-28 14:59:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:30,712 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 363 transitions. [2020-10-28 14:59:30,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 14:59:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 363 transitions. [2020-10-28 14:59:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-28 14:59:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:30,715 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:30,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:59:30,715 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1291921585, now seen corresponding path program 33 times [2020-10-28 14:59:30,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:30,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429121960] [2020-10-28 14:59:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-28 14:59:36,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-28 14:59:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429121960] [2020-10-28 14:59:37,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:37,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 14:59:37,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159889057] [2020-10-28 14:59:37,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 14:59:37,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 14:59:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:59:37,240 INFO L87 Difference]: Start difference. First operand 338 states and 363 transitions. Second operand 29 states. [2020-10-28 14:59:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:41,155 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-28 14:59:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:59:41,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 337 [2020-10-28 14:59:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:41,157 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:59:41,157 INFO L226 Difference]: Without dead ends: 363 [2020-10-28 14:59:41,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 14:59:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-28 14:59:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-28 14:59:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-28 14:59:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-28 14:59:41,269 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 337 [2020-10-28 14:59:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:41,270 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-28 14:59:41,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 14:59:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-28 14:59:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-28 14:59:41,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:41,272 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:41,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:59:41,273 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 34 times [2020-10-28 14:59:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:41,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456214528] [2020-10-28 14:59:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:46,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:46,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-28 14:59:46,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:46,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 14:59:46,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:46,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 14:59:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-28 14:59:46,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:47,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:47,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:47,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-28 14:59:47,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456214528] [2020-10-28 14:59:47,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:47,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 14:59:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537470981] [2020-10-28 14:59:47,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 14:59:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 14:59:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:59:47,864 INFO L87 Difference]: Start difference. First operand 351 states and 377 transitions. Second operand 30 states. [2020-10-28 14:59:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:52,040 INFO L93 Difference]: Finished difference Result 382 states and 410 transitions. [2020-10-28 14:59:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:59:52,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 350 [2020-10-28 14:59:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:52,043 INFO L225 Difference]: With dead ends: 382 [2020-10-28 14:59:52,043 INFO L226 Difference]: Without dead ends: 376 [2020-10-28 14:59:52,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:59:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-28 14:59:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2020-10-28 14:59:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-28 14:59:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 391 transitions. [2020-10-28 14:59:52,179 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 391 transitions. Word has length 350 [2020-10-28 14:59:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:52,180 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 391 transitions. [2020-10-28 14:59:52,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 14:59:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 391 transitions. [2020-10-28 14:59:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-28 14:59:52,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:52,183 INFO L422 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:52,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:59:52,183 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142929, now seen corresponding path program 35 times [2020-10-28 14:59:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:52,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264033166] [2020-10-28 14:59:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:57,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:57,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-28 14:59:57,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:57,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-28 14:59:57,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:58,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:58,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:58,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:58,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:58,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-10-28 14:59:58,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264033166] [2020-10-28 14:59:58,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:58,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 14:59:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548404539] [2020-10-28 14:59:58,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 14:59:58,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 14:59:58,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:59:58,590 INFO L87 Difference]: Start difference. First operand 364 states and 391 transitions. Second operand 31 states. [2020-10-28 15:00:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:03,077 INFO L93 Difference]: Finished difference Result 395 states and 424 transitions. [2020-10-28 15:00:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:00:03,078 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 363 [2020-10-28 15:00:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:03,080 INFO L225 Difference]: With dead ends: 395 [2020-10-28 15:00:03,080 INFO L226 Difference]: Without dead ends: 389 [2020-10-28 15:00:03,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:00:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-28 15:00:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 377. [2020-10-28 15:00:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-28 15:00:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 405 transitions. [2020-10-28 15:00:03,206 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 405 transitions. Word has length 363 [2020-10-28 15:00:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:03,206 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 405 transitions. [2020-10-28 15:00:03,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:00:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 405 transitions. [2020-10-28 15:00:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-28 15:00:03,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:03,208 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:03,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:00:03,208 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash 362898954, now seen corresponding path program 36 times [2020-10-28 15:00:03,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:03,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721865335] [2020-10-28 15:00:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-28 15:00:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:09,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:09,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:09,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:09,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-28 15:00:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721865335] [2020-10-28 15:00:09,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:09,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:00:09,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171163421] [2020-10-28 15:00:09,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:00:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:00:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:00:09,800 INFO L87 Difference]: Start difference. First operand 377 states and 405 transitions. Second operand 32 states. [2020-10-28 15:00:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:14,575 INFO L93 Difference]: Finished difference Result 408 states and 438 transitions. [2020-10-28 15:00:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:00:14,576 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 376 [2020-10-28 15:00:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:14,578 INFO L225 Difference]: With dead ends: 408 [2020-10-28 15:00:14,578 INFO L226 Difference]: Without dead ends: 402 [2020-10-28 15:00:14,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:00:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-28 15:00:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2020-10-28 15:00:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-28 15:00:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 419 transitions. [2020-10-28 15:00:14,713 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 419 transitions. Word has length 376 [2020-10-28 15:00:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:14,714 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 419 transitions. [2020-10-28 15:00:14,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:00:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 419 transitions. [2020-10-28 15:00:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-28 15:00:14,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:14,719 INFO L422 BasicCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:14,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:00:14,719 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1492589041, now seen corresponding path program 37 times [2020-10-28 15:00:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:14,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20142090] [2020-10-28 15:00:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking...