/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:42:45,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:42:45,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:42:45,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:42:45,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:42:45,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:42:45,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:42:45,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:42:45,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:42:45,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:42:45,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:42:45,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:42:45,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:42:45,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:42:45,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:42:45,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:42:45,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:42:45,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:42:45,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:42:45,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:42:45,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:42:45,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:42:45,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:42:45,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:42:45,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:42:45,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:42:45,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:42:45,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:42:45,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:42:45,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:42:45,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:42:45,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:42:45,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:42:45,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:42:45,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:42:45,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:42:45,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:42:45,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:42:45,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:42:45,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:42:45,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:42:45,156 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 [2020-10-29 09:42:45,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:42:45,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:42:45,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:42:45,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:42:45,215 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:42:45,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:42:45,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:42:45,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:42:45,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:42:45,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:42:45,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:42:45,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:42:45,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:42:45,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:42:45,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:42:45,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:42:45,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:42:45,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:42:45,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:42:45,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:42:45,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:42:45,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:42:45,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:42:45,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:42:45,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:42:45,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:42:45,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:42:45,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:42:45,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:42:45,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:42:45,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:42:45,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:42:45,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:42:45,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:42:45,621 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:42:45,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-29 09:42:45,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5852c8538/42e9e97fb50c411bbcd2cf08b8ea4ef7/FLAG70032e7c8 [2020-10-29 09:42:46,375 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:42:46,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-29 09:42:46,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5852c8538/42e9e97fb50c411bbcd2cf08b8ea4ef7/FLAG70032e7c8 [2020-10-29 09:42:46,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5852c8538/42e9e97fb50c411bbcd2cf08b8ea4ef7 [2020-10-29 09:42:46,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:42:46,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:42:46,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:42:46,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:42:46,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:42:46,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:42:46" (1/1) ... [2020-10-29 09:42:46,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685e4fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:46, skipping insertion in model container [2020-10-29 09:42:46,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:42:46" (1/1) ... [2020-10-29 09:42:46,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:42:46,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:42:46,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:42:47,006 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:42:47,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:42:47,041 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:42:47,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47 WrapperNode [2020-10-29 09:42:47,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:42:47,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:42:47,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:42:47,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:42:47,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (1/1) ... [2020-10-29 09:42:47,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:42:47,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:42:47,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:42:47,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:42:47,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (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 [2020-10-29 09:42:47,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:42:47,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:42:47,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:42:47,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:42:47,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:42:47,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:42:47,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:42:47,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:42:47,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:42:47,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:42:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:42:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:42:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:42:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:42:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:42:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:42:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:42:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:42:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:42:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:42:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:42:47,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:42:47,672 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:42:47,672 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:42:47,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:42:47 BoogieIcfgContainer [2020-10-29 09:42:47,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:42:47,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:42:47,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:42:47,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:42:47,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:42:46" (1/3) ... [2020-10-29 09:42:47,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b60ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:42:47, skipping insertion in model container [2020-10-29 09:42:47,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:42:47" (2/3) ... [2020-10-29 09:42:47,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b60ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:42:47, skipping insertion in model container [2020-10-29 09:42:47,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:42:47" (3/3) ... [2020-10-29 09:42:47,687 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-29 09:42:47,701 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:42:47,706 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:42:47,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:42:47,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:42:47,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:42:47,764 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:42:47,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:42:47,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:42:47,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:42:47,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:42:47,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:42:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 09:42:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:42:47,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:47,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:47,798 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2005588687, now seen corresponding path program 1 times [2020-10-29 09:42:47,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:47,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344603762] [2020-10-29 09:42:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:47,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:48,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:42:48,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:42:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-29 09:42:48,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:48,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:42:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:42:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:42:48,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:48,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:48,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:48,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:48,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:42:48,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:48,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344603762] [2020-10-29 09:42:48,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:42:48,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:42:48,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311412673] [2020-10-29 09:42:48,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:42:48,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:42:48,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:42:48,566 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-29 09:42:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:48,898 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-29 09:42:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:42:48,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-29 09:42:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:48,908 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:42:48,908 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:42:48,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:42:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:42:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:42:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:42:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 09:42:48,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-29 09:42:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:48,957 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 09:42:48,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:42:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 09:42:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:42:48,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:48,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:48,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:42:48,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -338650440, now seen corresponding path program 1 times [2020-10-29 09:42:48,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:48,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070210015] [2020-10-29 09:42:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:48,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:42:49,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:49,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-29 09:42:49,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:42:49,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:42:49,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:49,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:49,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:42:49,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:49,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:49,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:49,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070210015] [2020-10-29 09:42:49,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:49,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:42:49,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607390508] [2020-10-29 09:42:49,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:42:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:42:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:42:49,316 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-29 09:42:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:49,502 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-29 09:42:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:42:49,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-29 09:42:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:49,504 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:42:49,504 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:42:49,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:42:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:42:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:42:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:42:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:42:49,513 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-29 09:42:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:49,513 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:42:49,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:42:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:42:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:42:49,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:49,515 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:42:49,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1757895990, now seen corresponding path program 2 times [2020-10-29 09:42:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427061168] [2020-10-29 09:42:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:42:49,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:49,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-29 09:42:49,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:42:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:42:49,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:49,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:49,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:42:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:49,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:49,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:49,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:42:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:49,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427061168] [2020-10-29 09:42:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:49,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:42:49,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843851574] [2020-10-29 09:42:49,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:42:49,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:42:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:42:49,810 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-29 09:42:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:50,069 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-29 09:42:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:42:50,069 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:42:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:50,070 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:42:50,071 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:42:50,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:42:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:42:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:42:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:42:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-29 09:42:50,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-29 09:42:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:50,079 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-29 09:42:50,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:42:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-29 09:42:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:42:50,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:50,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:42:50,081 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1450953080, now seen corresponding path program 3 times [2020-10-29 09:42:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972775617] [2020-10-29 09:42:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:50,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:42:50,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 09:42:50,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:42:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:42:50,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:50,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:50,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:50,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:42:50,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:42:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972775617] [2020-10-29 09:42:50,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:50,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:42:50,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855940948] [2020-10-29 09:42:50,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:42:50,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:50,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:42:50,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:42:50,371 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-10-29 09:42:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:50,699 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-29 09:42:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:42:50,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-29 09:42:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:50,701 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:42:50,701 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:42:50,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:42:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:42:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:42:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:42:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-29 09:42:50,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-29 09:42:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:50,710 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-29 09:42:50,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:42:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-29 09:42:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:42:50,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:50,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:50,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:42:50,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1108476918, now seen corresponding path program 4 times [2020-10-29 09:42:50,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:50,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158808614] [2020-10-29 09:42:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:50,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:42:50,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:50,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-29 09:42:50,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:42:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:42:50,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:50,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:51,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:51,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:51,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:51,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:42:51,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:51,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:51,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:51,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:51,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:51,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:51,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158808614] [2020-10-29 09:42:51,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:51,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:42:51,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485680125] [2020-10-29 09:42:51,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:42:51,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:42:51,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:42:51,027 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 10 states. [2020-10-29 09:42:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:51,385 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-29 09:42:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:42:51,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:42:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:51,387 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:42:51,387 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:42:51,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:42:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:42:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:42:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:42:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-29 09:42:51,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-29 09:42:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:51,395 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-29 09:42:51,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:42:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-29 09:42:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:42:51,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:51,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:51,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:42:51,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -533141448, now seen corresponding path program 5 times [2020-10-29 09:42:51,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:51,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905533110] [2020-10-29 09:42:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:51,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:51,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:42:51,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:51,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-29 09:42:51,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:51,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:51,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:42:51,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:51,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:42:51,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:42:51,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:51,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:51,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:42:51,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:51,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:51,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:51,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:42:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:51,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905533110] [2020-10-29 09:42:51,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:51,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:42:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829260523] [2020-10-29 09:42:51,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:42:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:42:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:42:51,749 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-10-29 09:42:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:52,235 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-29 09:42:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:42:52,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:42:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:52,236 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:42:52,236 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:42:52,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:42:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:42:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:42:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:42:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-29 09:42:52,245 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-29 09:42:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:52,245 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-29 09:42:52,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:42:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-29 09:42:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:42:52,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:52,247 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:52,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:42:52,247 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1928633014, now seen corresponding path program 6 times [2020-10-29 09:42:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:52,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140612364] [2020-10-29 09:42:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:42:52,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:52,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:42:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:52,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:52,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:52,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140612364] [2020-10-29 09:42:52,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:52,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:42:52,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761956361] [2020-10-29 09:42:52,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:42:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:52,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:42:52,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:42:52,616 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 12 states. [2020-10-29 09:42:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:53,228 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-29 09:42:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:42:53,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-29 09:42:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:53,230 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:42:53,230 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:42:53,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:42:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:42:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:42:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:42:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-29 09:42:53,238 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-29 09:42:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:53,239 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-29 09:42:53,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:42:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-29 09:42:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:42:53,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:53,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:53,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:42:53,241 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 265549560, now seen corresponding path program 7 times [2020-10-29 09:42:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:53,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608835546] [2020-10-29 09:42:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:53,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:53,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:42:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:53,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:42:53,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:53,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:42:53,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:53,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:42:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:53,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608835546] [2020-10-29 09:42:53,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:53,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:42:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41495740] [2020-10-29 09:42:53,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:42:53,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:42:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:42:53,802 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 13 states. [2020-10-29 09:42:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:54,640 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-29 09:42:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:42:54,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-29 09:42:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:54,642 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:42:54,642 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:42:54,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:42:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:42:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:42:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:42:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-29 09:42:54,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-29 09:42:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:54,652 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-29 09:42:54,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:42:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-29 09:42:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:42:54,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:54,653 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:54,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:42:54,654 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2051333770, now seen corresponding path program 8 times [2020-10-29 09:42:54,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:54,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606558196] [2020-10-29 09:42:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:54,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:54,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:42:54,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:54,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-29 09:42:54,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:54,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:54,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:42:54,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:54,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:42:54,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:55,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:55,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:55,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:55,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:55,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606558196] [2020-10-29 09:42:55,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:55,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:42:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500652663] [2020-10-29 09:42:55,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:42:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:42:55,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:42:55,189 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 14 states. [2020-10-29 09:42:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:56,044 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-29 09:42:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:42:56,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:42:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:56,049 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:42:56,049 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:42:56,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:42:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:42:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:42:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:42:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-29 09:42:56,061 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-29 09:42:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:56,062 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-29 09:42:56,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:42:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-29 09:42:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:42:56,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:56,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:56,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:42:56,065 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash 588838328, now seen corresponding path program 9 times [2020-10-29 09:42:56,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:56,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448299509] [2020-10-29 09:42:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:56,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:56,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:56,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:42:56,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:56,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:56,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:56,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:56,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448299509] [2020-10-29 09:42:56,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:56,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:42:56,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346822504] [2020-10-29 09:42:56,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:42:56,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:42:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:42:56,673 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 15 states. [2020-10-29 09:42:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:57,687 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-29 09:42:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:42:57,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-29 09:42:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:57,688 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:42:57,688 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:42:57,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:42:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:42:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:42:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:42:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-29 09:42:57,710 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-29 09:42:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:57,713 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-29 09:42:57,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:42:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-29 09:42:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:42:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:57,714 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:57,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:42:57,715 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -464623670, now seen corresponding path program 10 times [2020-10-29 09:42:57,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743667946] [2020-10-29 09:42:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:57,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:58,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:58,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:42:58,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:42:58,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:58,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:58,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:58,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:58,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:58,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:58,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743667946] [2020-10-29 09:42:58,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:58,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:42:58,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122324102] [2020-10-29 09:42:58,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:42:58,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:42:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:42:58,413 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 16 states. [2020-10-29 09:42:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:59,428 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-29 09:42:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:42:59,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 09:42:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:59,429 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:42:59,429 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:42:59,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:42:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:42:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:42:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:42:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-29 09:42:59,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-29 09:42:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:59,439 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-29 09:42:59,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:42:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-29 09:42:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:42:59,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:59,440 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:59,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:42:59,441 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -824974216, now seen corresponding path program 11 times [2020-10-29 09:42:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:59,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705175655] [2020-10-29 09:42:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:59,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:59,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:42:59,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:42:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:00,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:00,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:00,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:00,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:00,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:00,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705175655] [2020-10-29 09:43:00,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:00,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:43:00,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849199252] [2020-10-29 09:43:00,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:43:00,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:43:00,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:43:00,138 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 17 states. [2020-10-29 09:43:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:01,307 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-29 09:43:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:43:01,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-29 09:43:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:01,308 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:43:01,309 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:43:01,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:43:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:43:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:43:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:43:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-29 09:43:01,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 48 [2020-10-29 09:43:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:01,319 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-29 09:43:01,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:43:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-29 09:43:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:43:01,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:01,320 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:01,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:43:01,321 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1390149898, now seen corresponding path program 12 times [2020-10-29 09:43:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:01,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570094738] [2020-10-29 09:43:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:01,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:43:01,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:01,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-29 09:43:01,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:01,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:43:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:02,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:02,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:02,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:02,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:02,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570094738] [2020-10-29 09:43:02,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:02,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:43:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915867928] [2020-10-29 09:43:02,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:43:02,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:02,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:43:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:43:02,142 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 18 states. [2020-10-29 09:43:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:03,485 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-29 09:43:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:43:03,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-29 09:43:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:03,488 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:43:03,488 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:43:03,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:43:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:43:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:43:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:43:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-29 09:43:03,509 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 51 [2020-10-29 09:43:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:03,509 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-29 09:43:03,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:43:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-29 09:43:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:43:03,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:03,516 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:03,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:43:03,516 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -19872968, now seen corresponding path program 13 times [2020-10-29 09:43:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:03,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022449796] [2020-10-29 09:43:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:04,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:43:04,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:04,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-29 09:43:04,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:04,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:43:04,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:04,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:43:04,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:04,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:04,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:04,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:04,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:04,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:04,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022449796] [2020-10-29 09:43:04,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:43:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686346133] [2020-10-29 09:43:04,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:43:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:43:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:43:04,413 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 19 states. [2020-10-29 09:43:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:05,902 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-29 09:43:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:43:05,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-29 09:43:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:05,904 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:43:05,904 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:43:05,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:43:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:43:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:43:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:43:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-29 09:43:05,915 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 54 [2020-10-29 09:43:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:05,915 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-29 09:43:05,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:43:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-29 09:43:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:43:05,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:05,916 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:05,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:43:05,917 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1230919094, now seen corresponding path program 14 times [2020-10-29 09:43:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:05,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864659827] [2020-10-29 09:43:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:05,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:43:06,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-29 09:43:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:06,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:43:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:43:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:06,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:06,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:06,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864659827] [2020-10-29 09:43:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:43:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7694784] [2020-10-29 09:43:06,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:43:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:43:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:43:06,815 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 20 states. [2020-10-29 09:43:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:08,373 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-29 09:43:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:43:08,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-29 09:43:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:08,375 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:43:08,375 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:43:08,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:43:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:43:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:43:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:43:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-29 09:43:08,390 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 57 [2020-10-29 09:43:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:08,391 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-29 09:43:08,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:43:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-29 09:43:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:43:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:08,394 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:08,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:43:08,394 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1780772360, now seen corresponding path program 15 times [2020-10-29 09:43:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:08,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47982988] [2020-10-29 09:43:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:09,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:09,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:43:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:43:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:09,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:09,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:09,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:09,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:09,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:09,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:09,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:09,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:09,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47982988] [2020-10-29 09:43:09,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:09,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:43:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515484214] [2020-10-29 09:43:09,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:43:09,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:09,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:43:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:43:09,414 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 21 states. [2020-10-29 09:43:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:11,155 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-29 09:43:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:43:11,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-29 09:43:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:11,158 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:43:11,158 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:43:11,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:43:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:43:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-29 09:43:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:43:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-29 09:43:11,168 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 60 [2020-10-29 09:43:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:11,168 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-29 09:43:11,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:43:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-29 09:43:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:43:11,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:11,170 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:11,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:43:11,170 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1454152822, now seen corresponding path program 16 times [2020-10-29 09:43:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:11,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836569425] [2020-10-29 09:43:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:11,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:11,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:11,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:43:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:12,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:12,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:12,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:12,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:12,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:12,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:12,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:12,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836569425] [2020-10-29 09:43:12,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:12,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:43:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082421952] [2020-10-29 09:43:12,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:43:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:43:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:43:12,326 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 22 states. [2020-10-29 09:43:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:14,312 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-29 09:43:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:43:14,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-29 09:43:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:14,313 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:43:14,314 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:43:14,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:43:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:43:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:43:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:43:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-29 09:43:14,324 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 63 [2020-10-29 09:43:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:14,324 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-29 09:43:14,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:43:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-29 09:43:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:43:14,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:14,325 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:14,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:43:14,325 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash 767578296, now seen corresponding path program 17 times [2020-10-29 09:43:14,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:14,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253038781] [2020-10-29 09:43:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:15,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:15,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:43:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:15,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:43:15,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:15,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:15,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:15,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:15,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:15,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:43:15,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:15,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:15,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:43:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253038781] [2020-10-29 09:43:15,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:15,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:43:15,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582402409] [2020-10-29 09:43:15,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:43:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:43:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:43:15,635 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 23 states. [2020-10-29 09:43:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:17,840 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-29 09:43:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:43:17,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-29 09:43:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:17,842 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:43:17,842 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:43:17,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:43:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:43:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-29 09:43:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:43:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-10-29 09:43:17,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 66 [2020-10-29 09:43:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:17,857 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-10-29 09:43:17,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:43:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-10-29 09:43:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:43:17,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:17,858 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:17,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:43:17,858 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1381684022, now seen corresponding path program 18 times [2020-10-29 09:43:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:17,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754999500] [2020-10-29 09:43:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:18,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:43:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:18,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:43:18,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:19,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:19,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:19,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:19,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:19,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754999500] [2020-10-29 09:43:19,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:19,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:43:19,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324148654] [2020-10-29 09:43:19,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:43:19,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:19,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:43:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:43:19,132 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 24 states. [2020-10-29 09:43:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:21,539 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-10-29 09:43:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:43:21,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-29 09:43:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:21,541 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:43:21,541 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:43:21,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:43:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:43:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:43:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:43:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-29 09:43:21,550 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 69 [2020-10-29 09:43:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:21,550 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-29 09:43:21,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:43:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-29 09:43:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:43:21,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:21,551 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:21,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:43:21,552 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash -682950792, now seen corresponding path program 19 times [2020-10-29 09:43:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:21,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643428970] [2020-10-29 09:43:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:22,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:22,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:43:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:22,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:43:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:22,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:22,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:22,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643428970] [2020-10-29 09:43:22,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:22,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:43:22,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26796031] [2020-10-29 09:43:22,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:43:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:43:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:43:22,886 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 25 states. [2020-10-29 09:43:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:25,475 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-10-29 09:43:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:43:25,477 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-29 09:43:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:25,478 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:43:25,478 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:43:25,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:43:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:43:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-29 09:43:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:43:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-29 09:43:25,489 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 72 [2020-10-29 09:43:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:25,489 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-29 09:43:25,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:43:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-29 09:43:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:43:25,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:25,490 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:25,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:43:25,491 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1867187722, now seen corresponding path program 20 times [2020-10-29 09:43:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:25,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481878712] [2020-10-29 09:43:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:25,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:26,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:26,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 09:43:26,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 09:43:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:26,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:26,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:26,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:26,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:26,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:26,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481878712] [2020-10-29 09:43:26,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:26,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:43:26,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462658674] [2020-10-29 09:43:26,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:43:26,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:43:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:43:26,892 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 26 states. [2020-10-29 09:43:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:29,686 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-29 09:43:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:43:29,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-29 09:43:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:29,688 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:43:29,688 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:43:29,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:43:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:43:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 09:43:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:43:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-29 09:43:29,699 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 75 [2020-10-29 09:43:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-29 09:43:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:43:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-29 09:43:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:43:29,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:29,700 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:29,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:43:29,701 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -632840648, now seen corresponding path program 21 times [2020-10-29 09:43:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:29,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999828352] [2020-10-29 09:43:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:29,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:30,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:43:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:30,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 09:43:30,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:31,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:31,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:31,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:31,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999828352] [2020-10-29 09:43:31,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:31,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:43:31,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286297859] [2020-10-29 09:43:31,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:43:31,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:31,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:43:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:43:31,252 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 27 states. [2020-10-29 09:43:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:34,328 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-10-29 09:43:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:43:34,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-29 09:43:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:34,334 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:43:34,334 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:43:34,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:43:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:43:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-29 09:43:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:43:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-10-29 09:43:34,344 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 78 [2020-10-29 09:43:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:34,345 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-10-29 09:43:34,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:43:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-10-29 09:43:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 09:43:34,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:34,346 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:34,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:43:34,346 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 49868618, now seen corresponding path program 22 times [2020-10-29 09:43:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:34,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649600483] [2020-10-29 09:43:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:34,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:35,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:35,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 09:43:35,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:35,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-29 09:43:35,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:35,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:35,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:43:35,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:35,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:43:35,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:36,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:36,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:36,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:36,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:36,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:36,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:36,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649600483] [2020-10-29 09:43:36,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:36,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:43:36,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897165761] [2020-10-29 09:43:36,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:43:36,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:43:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:43:36,107 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 28 states. [2020-10-29 09:43:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:39,455 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2020-10-29 09:43:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:43:39,455 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-29 09:43:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:39,457 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:43:39,457 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:43:39,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:43:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:43:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:43:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:43:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2020-10-29 09:43:39,466 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 81 [2020-10-29 09:43:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:39,467 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2020-10-29 09:43:39,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:43:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2020-10-29 09:43:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:43:39,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:39,468 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:39,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:43:39,468 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1971465464, now seen corresponding path program 23 times [2020-10-29 09:43:39,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:39,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741746147] [2020-10-29 09:43:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:39,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:40,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:43:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 09:43:40,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:41,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:41,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741746147] [2020-10-29 09:43:41,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:41,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:43:41,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594297983] [2020-10-29 09:43:41,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:43:41,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:43:41,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:43:41,205 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand 29 states. [2020-10-29 09:43:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:44,840 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-29 09:43:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:43:44,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-29 09:43:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:44,842 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:43:44,842 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:43:44,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:43:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:43:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-29 09:43:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:43:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-10-29 09:43:44,853 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 84 [2020-10-29 09:43:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:44,854 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-10-29 09:43:44,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:43:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-10-29 09:43:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 09:43:44,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:44,855 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:44,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:43:44,855 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash 644016266, now seen corresponding path program 24 times [2020-10-29 09:43:44,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:44,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695585626] [2020-10-29 09:43:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:44,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:46,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:46,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 09:43:46,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:46,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:46,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:46,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:46,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:46,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:46,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:46,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:46,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:46,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695585626] [2020-10-29 09:43:46,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:46,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:43:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126417029] [2020-10-29 09:43:46,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:43:46,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:43:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:43:46,868 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 30 states. [2020-10-29 09:43:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:50,766 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2020-10-29 09:43:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:43:50,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-29 09:43:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:50,769 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:43:50,769 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:43:50,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:43:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:43:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-29 09:43:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:43:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2020-10-29 09:43:50,781 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 87 [2020-10-29 09:43:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:50,782 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2020-10-29 09:43:50,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:43:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2020-10-29 09:43:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 09:43:50,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:50,783 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:50,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:43:50,783 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1631147080, now seen corresponding path program 25 times [2020-10-29 09:43:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:50,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52157596] [2020-10-29 09:43:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:51,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:51,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 09:43:51,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-29 09:43:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:52,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:52,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:52,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:52,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:52,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:52,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:52,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52157596] [2020-10-29 09:43:52,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:52,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:43:52,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49527546] [2020-10-29 09:43:52,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:43:52,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:43:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:43:52,691 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 31 states. [2020-10-29 09:43:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:56,927 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2020-10-29 09:43:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:43:56,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-10-29 09:43:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:56,929 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:43:56,929 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:43:56,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:43:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:43:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-29 09:43:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:43:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2020-10-29 09:43:56,941 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 90 [2020-10-29 09:43:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:56,941 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2020-10-29 09:43:56,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:43:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2020-10-29 09:43:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 09:43:56,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:56,943 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:56,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:43:56,943 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2143489590, now seen corresponding path program 26 times [2020-10-29 09:43:56,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:56,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197430624] [2020-10-29 09:43:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:57,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:57,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:57,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 09:43:57,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:57,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 09:43:57,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:58,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:58,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:58,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197430624] [2020-10-29 09:43:58,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:58,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:43:58,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194044371] [2020-10-29 09:43:58,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:43:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:43:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:43:58,887 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand 32 states. [2020-10-29 09:44:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:03,365 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-29 09:44:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:44:03,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-10-29 09:44:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:03,367 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:44:03,367 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:44:03,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=179, Invalid=3481, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:44:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:44:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:44:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:44:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-10-29 09:44:03,381 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 93 [2020-10-29 09:44:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:03,381 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-10-29 09:44:03,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:44:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-10-29 09:44:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:44:03,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:03,382 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:03,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:44:03,383 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1025435016, now seen corresponding path program 27 times [2020-10-29 09:44:03,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:03,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353609860] [2020-10-29 09:44:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:04,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:04,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:44:04,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-29 09:44:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:04,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:44:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 09:44:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:05,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353609860] [2020-10-29 09:44:05,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:05,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:44:05,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820533691] [2020-10-29 09:44:05,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:44:05,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:05,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:44:05,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:44:05,247 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 33 states. [2020-10-29 09:44:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:09,978 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-29 09:44:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:44:09,979 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-29 09:44:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:09,980 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:44:09,980 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:44:09,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=185, Invalid=3721, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:44:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:44:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-29 09:44:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:44:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2020-10-29 09:44:09,992 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 96 [2020-10-29 09:44:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:09,992 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2020-10-29 09:44:09,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:44:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2020-10-29 09:44:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 09:44:09,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:09,993 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:09,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:44:09,994 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash -533001462, now seen corresponding path program 28 times [2020-10-29 09:44:09,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:09,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790283239] [2020-10-29 09:44:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:10,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:44:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:11,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:11,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:11,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:11,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:12,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790283239] [2020-10-29 09:44:12,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:12,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:44:12,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993470744] [2020-10-29 09:44:12,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:44:12,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:12,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:44:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:44:12,002 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 34 states. [2020-10-29 09:44:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:17,265 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-29 09:44:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:44:17,266 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-10-29 09:44:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:17,267 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:44:17,267 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:44:17,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=191, Invalid=3969, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:44:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:44:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:44:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:44:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-29 09:44:17,282 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 99 [2020-10-29 09:44:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:17,282 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-29 09:44:17,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:44:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-29 09:44:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 09:44:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:17,283 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:17,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:44:17,284 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2053277384, now seen corresponding path program 29 times [2020-10-29 09:44:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:17,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001636901] [2020-10-29 09:44:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:18,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 09:44:18,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:19,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:19,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:19,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:19,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:19,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:19,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001636901] [2020-10-29 09:44:19,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:19,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:44:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908886648] [2020-10-29 09:44:19,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:44:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:44:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:44:19,615 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 35 states. [2020-10-29 09:44:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:25,265 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2020-10-29 09:44:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:44:25,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-10-29 09:44:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:25,267 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:44:25,267 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 09:44:25,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=197, Invalid=4225, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:44:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 09:44:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-29 09:44:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:44:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2020-10-29 09:44:25,282 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 102 [2020-10-29 09:44:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:25,282 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2020-10-29 09:44:25,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:44:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2020-10-29 09:44:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 09:44:25,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:25,284 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:25,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:44:25,284 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2131833930, now seen corresponding path program 30 times [2020-10-29 09:44:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:25,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205903073] [2020-10-29 09:44:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:26,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:26,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 09:44:26,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-29 09:44:26,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:26,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:44:26,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:26,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 09:44:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:44:27,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:27,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205903073] [2020-10-29 09:44:27,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:27,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:44:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429668517] [2020-10-29 09:44:27,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:44:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:44:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:44:27,856 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand 36 states. [2020-10-29 09:44:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:33,942 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-29 09:44:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:44:33,944 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-29 09:44:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:33,945 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:44:33,946 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:44:33,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:44:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:44:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-29 09:44:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:44:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-10-29 09:44:33,956 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 105 [2020-10-29 09:44:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:33,957 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-10-29 09:44:33,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:44:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-10-29 09:44:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:44:33,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:33,958 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:33,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:44:33,959 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2117613576, now seen corresponding path program 31 times [2020-10-29 09:44:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:33,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594712977] [2020-10-29 09:44:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:35,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 09:44:35,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:36,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:36,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:36,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594712977] [2020-10-29 09:44:36,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:44:36,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829527118] [2020-10-29 09:44:36,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:44:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:44:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:44:36,550 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 37 states. [2020-10-29 09:44:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:42,941 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2020-10-29 09:44:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:44:42,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-29 09:44:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:42,944 INFO L225 Difference]: With dead ends: 119 [2020-10-29 09:44:42,944 INFO L226 Difference]: Without dead ends: 112 [2020-10-29 09:44:42,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=209, Invalid=4761, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:44:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-29 09:44:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-29 09:44:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 09:44:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2020-10-29 09:44:42,958 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 108 [2020-10-29 09:44:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:42,959 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2020-10-29 09:44:42,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:44:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2020-10-29 09:44:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 09:44:42,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:42,960 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:42,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:44:42,960 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1047752074, now seen corresponding path program 32 times [2020-10-29 09:44:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:42,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408402545] [2020-10-29 09:44:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:44,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:44,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 09:44:44,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-29 09:44:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:44,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:44,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:44:44,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:44,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 09:44:44,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:45,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:45,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:45,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:45,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:45,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:45,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408402545] [2020-10-29 09:44:45,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:45,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:44:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261977380] [2020-10-29 09:44:45,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:44:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:44:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:44:45,705 INFO L87 Difference]: Start difference. First operand 112 states and 145 transitions. Second operand 38 states. [2020-10-29 09:44:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:44:52,652 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-10-29 09:44:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:44:52,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-10-29 09:44:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:44:52,654 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:44:52,654 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:44:52,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:44:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:44:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-29 09:44:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:44:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2020-10-29 09:44:52,671 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 111 [2020-10-29 09:44:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:44:52,671 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2020-10-29 09:44:52,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:44:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2020-10-29 09:44:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-29 09:44:52,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:44:52,672 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:44:52,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:44:52,673 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:44:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:44:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 153880248, now seen corresponding path program 33 times [2020-10-29 09:44:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:44:52,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592873430] [2020-10-29 09:44:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:44:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:54,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 09:44:54,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:55,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:44:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:44:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:44:55,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:44:55,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:44:55,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:44:55,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:44:55,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:44:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:44:55,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592873430] [2020-10-29 09:44:55,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:44:55,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:44:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27784220] [2020-10-29 09:44:55,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:44:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:44:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:44:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:44:55,618 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand 39 states. [2020-10-29 09:45:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:03,082 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-29 09:45:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:45:03,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-10-29 09:45:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:03,085 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:45:03,085 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 09:45:03,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=221, Invalid=5329, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:45:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 09:45:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-29 09:45:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:45:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2020-10-29 09:45:03,101 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 114 [2020-10-29 09:45:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:03,102 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2020-10-29 09:45:03,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:45:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2020-10-29 09:45:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 09:45:03,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:03,103 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:03,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:45:03,103 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -384452918, now seen corresponding path program 34 times [2020-10-29 09:45:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:03,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680153299] [2020-10-29 09:45:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:04,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:04,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-29 09:45:04,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:06,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:06,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:06,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:06,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:06,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:06,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680153299] [2020-10-29 09:45:06,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:06,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:45:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406709909] [2020-10-29 09:45:06,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:45:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:45:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:45:06,236 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand 40 states. [2020-10-29 09:45:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:14,140 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2020-10-29 09:45:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:45:14,141 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-29 09:45:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:14,143 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:45:14,143 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:45:14,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=227, Invalid=5625, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:45:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:45:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-29 09:45:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:45:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2020-10-29 09:45:14,160 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 117 [2020-10-29 09:45:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:14,161 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2020-10-29 09:45:14,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:45:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2020-10-29 09:45:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 09:45:14,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:14,161 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:14,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:45:14,162 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -459917960, now seen corresponding path program 35 times [2020-10-29 09:45:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:14,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762961865] [2020-10-29 09:45:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:15,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1388 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 09:45:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:17,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:17,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:17,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:17,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:17,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762961865] [2020-10-29 09:45:17,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:17,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:45:17,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145162358] [2020-10-29 09:45:17,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:45:17,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:45:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:45:17,307 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand 41 states. [2020-10-29 09:45:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:25,580 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2020-10-29 09:45:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:45:25,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-10-29 09:45:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:25,583 INFO L225 Difference]: With dead ends: 131 [2020-10-29 09:45:25,583 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:45:25,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=233, Invalid=5929, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:45:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:45:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-29 09:45:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:45:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2020-10-29 09:45:25,599 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 120 [2020-10-29 09:45:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:25,600 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2020-10-29 09:45:25,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:45:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2020-10-29 09:45:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 09:45:25,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:25,601 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:25,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:45:25,601 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:25,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1923878922, now seen corresponding path program 36 times [2020-10-29 09:45:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:25,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102865973] [2020-10-29 09:45:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:27,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:27,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-29 09:45:27,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:27,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-29 09:45:27,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:29,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:29,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102865973] [2020-10-29 09:45:29,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:29,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:45:29,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197359265] [2020-10-29 09:45:29,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:45:29,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:45:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:45:29,183 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand 42 states. [2020-10-29 09:45:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:37,949 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-10-29 09:45:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:45:37,950 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-10-29 09:45:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:37,951 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:45:37,952 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:45:37,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=239, Invalid=6241, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:45:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:45:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-29 09:45:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:45:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2020-10-29 09:45:37,968 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 123 [2020-10-29 09:45:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:37,969 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2020-10-29 09:45:37,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:45:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2020-10-29 09:45:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 09:45:37,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:37,970 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:37,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:45:37,970 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash 332551224, now seen corresponding path program 37 times [2020-10-29 09:45:37,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:37,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356381955] [2020-10-29 09:45:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:39,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:39,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1578 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-29 09:45:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:41,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:41,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:41,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:41,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:41,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:41,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:45:41,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:41,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:41,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:41,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:41,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356381955] [2020-10-29 09:45:41,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:41,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:45:41,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593529911] [2020-10-29 09:45:41,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:45:41,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:45:41,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:45:41,473 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand 43 states. [2020-10-29 09:45:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:45:50,642 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2020-10-29 09:45:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:45:50,643 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 126 [2020-10-29 09:45:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:45:50,645 INFO L225 Difference]: With dead ends: 137 [2020-10-29 09:45:50,645 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 09:45:50,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=245, Invalid=6561, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:45:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 09:45:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-29 09:45:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-29 09:45:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2020-10-29 09:45:50,661 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 126 [2020-10-29 09:45:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:45:50,662 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2020-10-29 09:45:50,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:45:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2020-10-29 09:45:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 09:45:50,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:45:50,663 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:45:50,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:45:50,663 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:45:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:45:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash 938113354, now seen corresponding path program 38 times [2020-10-29 09:45:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:45:50,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380811081] [2020-10-29 09:45:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:45:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:50,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:52,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-29 09:45:52,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1858 [2020-10-29 09:45:52,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:52,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:45:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:45:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-29 09:45:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:45:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:45:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:45:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:45:54,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:45:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:45:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:45:54,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380811081] [2020-10-29 09:45:54,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:45:54,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:45:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521328729] [2020-10-29 09:45:54,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:45:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:45:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:45:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:45:54,580 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand 44 states. [2020-10-29 09:46:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:04,020 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2020-10-29 09:46:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:46:04,022 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-29 09:46:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:04,023 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:46:04,023 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:46:04,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=251, Invalid=6889, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:46:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:46:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-29 09:46:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:46:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2020-10-29 09:46:04,035 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 129 [2020-10-29 09:46:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:04,036 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2020-10-29 09:46:04,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:46:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2020-10-29 09:46:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 09:46:04,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:04,037 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:04,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:46:04,037 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1918082312, now seen corresponding path program 39 times [2020-10-29 09:46:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:04,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080815365] [2020-10-29 09:46:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-29 09:46:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:07,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:07,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:07,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:07,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:07,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:07,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080815365] [2020-10-29 09:46:07,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:07,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:46:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6382232] [2020-10-29 09:46:07,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:46:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:46:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:46:07,787 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand 45 states. [2020-10-29 09:46:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:17,694 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2020-10-29 09:46:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:46:17,695 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 132 [2020-10-29 09:46:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:17,697 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:46:17,697 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:46:17,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=257, Invalid=7225, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:46:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:46:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-29 09:46:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:46:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2020-10-29 09:46:17,721 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 132 [2020-10-29 09:46:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:17,721 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2020-10-29 09:46:17,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:46:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2020-10-29 09:46:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 09:46:17,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:17,722 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:17,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:46:17,723 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1048900234, now seen corresponding path program 40 times [2020-10-29 09:46:17,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:17,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629142456] [2020-10-29 09:46:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:19,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:19,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-29 09:46:19,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-29 09:46:19,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:22,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:22,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:22,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:22,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:22,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629142456] [2020-10-29 09:46:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:22,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:46:22,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926124778] [2020-10-29 09:46:22,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:46:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:46:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:46:22,202 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand 46 states. [2020-10-29 09:46:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:32,668 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2020-10-29 09:46:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:46:32,670 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-10-29 09:46:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:32,673 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:46:32,674 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:46:32,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=263, Invalid=7569, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:46:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:46:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-29 09:46:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:46:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-29 09:46:32,692 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 135 [2020-10-29 09:46:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:32,692 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-29 09:46:32,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:46:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-29 09:46:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 09:46:32,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:32,693 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:32,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:46:32,694 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1023560, now seen corresponding path program 41 times [2020-10-29 09:46:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:32,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055897926] [2020-10-29 09:46:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:32,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking...